Why is radium more reactive than calcium?

Answers

Answer 1
Because radium is created from the decay of the uranium atom,

Related Questions

please help me and you get Brainliest is anyone go to answer my question

Answers

Answer: mitosis results in two. meiosis results in four.

Explanation:

Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells

What causes an earthquake to happen?
A. O Rocks deform slowly as a result of physical stress.
B. O Rocks along a fault move suddenly and release energy.
C. Large amounts of rock suddenly shift downward when large holes form
underground
D. O Energy is transferred to rock layers from convection currents in the oceans
and the atmosphere.

Answers

The answer is is is is is d

what are three uses of oxygen ?

Answers

Answer:

Production Of Steel Plastics and textiles

Explanation:

It is many more etc

Maria walked on a beach made mostly of sand. She walked barefoot
on the beach early in the morning, and the sand was cool. When she
walked in the same area in the afternoon, the sand was hot.
Which statement best describes why the temperature of the sand
increased?

Answers

A: The atoms in the sand were moving more quickly

The statement that the atoms in the sand were moving more quickly best describes why the temperature of the sand is increased. The relationship between kinetic energy and temperature is explained here.

What is the relationship between kinetic energy and temperature?

The temperature of a body is directly proportional to the kinetic energy. The energy acquired by those molecules which are in motion is called the kinetic energy.

The radiation of the sun falls on a number of objects on our surroundings. The objects absorb this energy till afternoon due to which they become hot.

When Maria walked in afternoon, the sand was hot as its particles have gained the kinetic energy due to which they move rapidly from one place to another. So that the sand feels more hot in the afternoon.

Thus the atoms in the sand were moving more quickly best describes the increase in temperature of the sand.

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The solids and liquids with the strongest intermolecular forces of attraction will have the
lowest melting and boiling points.
a. TRUE
b. FALSE

Answers

trueeee!!!
step by step explanation

HELP I HAVE TO SUBMIT IN 5 MINS!!!!!!! :( I HAVE NO IDEA!!!

Answers

742 - 21.1 = 720.9 torr

The model represents how electromagnetic radiation transmits energy.
What does the model show?
A. Many light waves traveling away from a source
O B. Two light waves traveling perpendicularly to a source
C. Several light waves circling a source
D. A single light wave traveling away from a source.

Answers

The model represents where electromagnetic radiation transmits energy should be option d. A single light wave traveling away from a source.

What is electromagnetic radiation?

It is the energy that should be transmitted at the fixed velocity via the sinusoidally that varied from the electric and magnetic fields.

Here the frequency of variation of the energy should be presented by the Greek letter ν.

Hence, the option d is correct.

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The model depicts the transmission of energy by electromagnetic radiation. The model depicts a single light wave departing from a source.

What describes the light as electromagnetic waves?Light as a wave: Light is a type of electromagnetic wave that can be represented mathematically (described). A shifting magnetic field is produced by a shifting electric field, according to this paradigm. Light is produced when the electric field changes as a result of the changing magnetic field.Light can be thought of as a wave. Light is a type of electromagnetic wave. A fluctuating electric field, according to this hypothesis, generates a fluctuating magnetic field. The interaction of a changing magnetic field with a changing electric field produces light. When charged particles, such as electrons and protons, move, they generate electromagnetic fields, which transport the type of energy known as electromagnetic radiation, or light.

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GIVING BRAINIEST FIVE STARS AND HEART!
Please define the following term in your own words!


law of conservation of matter

Answers

Answer:

Matter cannot be created destroyed

Explanation

Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

Can someone answer this pleasee it’s free 15 points

Answers

the answer is C

have a great day :)

I don’t know

but thank u for the points

I need points hehe

Did you know?

Hawaii is the Widest State in America!!!!!!!

what would be the colour of litmus in sodium carbonate?
will make brainliest

Answers

Answer:

the color of the litmus paper will turn into blue color because sodium carbonate is basic in nature

In what way does the shape of a molecule affect how the molecule is
involved with living systems?
OA. It determines the weight of the molecule.
OB. It determines how the molecule functions.
O C. It determines oxidation states present in the molecule.
OD. It determines what elements are in the molecule.

Answers

Answer:

B

Explanation:

I'm not 100% sure, but B seems like the most likely answer because the shape of a molecule usually is a major factor in how molecules interact with each other.

I hope that helps.

what is C2H8 ? please hurry
(CH4=methane)
(C2H2=acetylene)

Answers

Answer:

Carbon carbon | C2H8 - PubChem.

Explanation:

Brainliest plz :)

Answer:

Carbon carbon | C2H8

Explanation:

happy to help

The statue of Liberty is made out of copper metal. When it was first constructed, the color of the copper metal was bright burnt orange.
Over time, however, it slowly developed a green color as it was exposed to air. What happened to the statue of liberty?

Answers

When the Statue was unveiled in 1886, it was a shiny brown color, like a penny. By 1906, the color had changed to green. The reason the Statue of Liberty changed colors is that the outer surface is covered with hundreds of thin copper sheets. Copper reacts with the air to form a patina or verdigris.

Hope this helps and good luckkk :)

Explanation:

The green color of the Statue of Liberty was due to the outer surface covered with hundreds of thin copper sheets. Copper reacts with the air to form a patina or verdigis

Both the stomach and the small intestine are involved in the digestion of food.
The churning of food by stomach muscles and peptidase enzymes in the small
intestine both break food molecules into smaller molecules.
Which statement best describes changes to food during digestion?

Answers

Answer: I think the answer is The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.

Explanation: Because the muscles would make the food smaller and the enzymes have a chemical change to it because it changes the molecules in the food.

The chemical processes in food digestion results in the formation of new

substances.

The statement that best describes the changes in food during digestion is;

The churning of the food is a physical process, which results in physical changes while the peptidase results in chemical changes of the food.

Reasons:  

The given processes in the digestion of food are;

Stomach: Food churning is the process by which the small intestine vigorously turns ingested food.

Small intestine: The action of the peptidase enzyme is to increase the rate of the digestion of food.

Therefore;

The churning of the food is a physical process, which results in physical changes while the peptidase results in chemical changes of the food.

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The possible question options obtained from a similar question online are;

The churning of the food and peptidase action both results in chemical changes.The churning of the brings about a chemical change, while the peptidase results in a physical change.The churning action brings about physical change, while the peptidase brings about chemical change.Both the churning action and the action of the peptidase result in chemical change.

?
How many protons, neutrons, and electrons does the following isotope have:
10 protons, 2 neutrons, 4 electrons
4 protons, 6 neutrons, 10 electrons
O
6
protons, 4 neutrons, 0 electrons
4 protons, 2 neutrons, 4 electrons

Answers

Answer:

D. 4 protons 2 neutrons and 4 electrons

Please help! Its for chem

Answers

Answer:

can you give me more info

Explanation:

i think it d or c

i got charts to help

May someone pls help me with this!

Answers

Answer:

Explanation:

1. Chemistry

2. Atoms

3. Anode

4. Cathode

Which of the following is a stable ion that exists under ordinary conditions?


N3-


Al+


Li2+


F2-

Answers

Answer:

Hmm 65

Explanation:

Which energy transformation produces electricity and is least likely to negatively impact the environment?

A) Generating electricity from a natural gas-fired power plant
B) Generating electricity from a coal-fired power plant
C) Generating electricity from a nuclear power plant
D) Generating electricity from a solar panel system

Answers

Hello!

The answer to this question is: D) Generating electricity from a solar panel system.

Thank you for asking this question!

It would be greatly appreciated if you thanked me and marked me as the brainliest!

Have an amazing day.

The energy transformation which produces electricity and is least likely to

negatively impact the environment is generating electricity from a solar

panel system.

Generating electricity from solar panel involves the use of solar energy from

the sun to generate electricity . This type of energy doesn't emit any type of

harmful radiation or release toxic compounds into the atmosphere which

makes it the least likely to negatively impact the environment.

Other options emit any type of harmful radiation or release toxic compounds

into the atmosphere which makes option D the most appropriate.

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Where is the Oort cloud located?
in the innermost region of the solar system, closest to the Sun
in the outermost region of the solar system, beyond Neptune
in the region between the Kuiper belt and the scattered disk
in the region beyond Neptune, but closer to the Sun than the Kuiper belt

Answers

Answer:

Option B - in the outermost region of the solar system, beyond Neptune.

Explanation:

The Oort Cloud is an extended shell of icy objects that exist in the outermost reaches of the solar system.

Answer:

b

Explanation:

i took the test

What is the random mixing of gas molecules called?
O A. Volume
O B. Temperature
C. Diffusion
O D. Pressure

Answers

Answer:

C. Diffusion

it is called diffusion

I believe the answer is C. Diffusion.

What is the process called when a solid becomes a liquid?
melting
freezing
condensing
boiling

Answers

the answer is melting

Answer: melting :)

Explanation:

The age of the seafloor __________as you move away from the mid ocean ridges to deep ocean trenches

A decreases
B increases
C does not change

Answers

the answer is B-increases

Answer:

stays the same

Explanation:

because the ocean floor usually doesn't spread instead the ocean floor plunges into deep under water canyons called deep ocean trenches.

Assignment Summary For this assignment, you will construct a scientific model of the water cycle to show how water is recycled through an ecosystem. Once you have drawn your model on a poster board, you will write one to two paragraphs explaining how water is transferred within and between organisms and the environment. Background Information Water is a very important compound. Organisms need water to carry out life-maintaining processes such as growth and development. Without water, living things will not survive. Water continually flows among the atmosphere, land, water, and living organisms. This process, called the water cycle, allows water to be recycled as it moves through Earth’s spheres. Materials Assignment Instructions Step 1: For this project, you are expected to submit the following: 1. Your model of the water cycle 2. One to two typewritten paragraphs describing the water cycle Step 2: Prepare for the project. a) Read through the guide before you begin so you know the expectations of this project. Pay particular attention to the instructions you need to follow to create a model on your poster board. b) If anything is not clear to you, be sure to ask your teacher. Step 3: Gather materials for the model. a) Start with a blank poster board. Be sure to put your name on it. b) You may either draw the parts of the water cycle or print images to construct a model on your poster board. Gather any drawing tools that you will need, or print any images you want to use. Step 4: Create a model of the water cycle. a) Your model should include bodies of water such as lakes and oceans, organisms, air, and land. b) Draw arrows indicating how water moves within an ecosystem and between organisms and their environment. Be sure to include the Sun and gravity in your model. c) Include short phrases on your poster that summarize what occurs at each stage of the water cycle Step 5: Write a paragraph describing the water cycle. a) Type one to two paragraphs describing the full water cycle. Be sure to use full sentences and proper grammar.

Answers

Answer:

Explanation:

Earth's water is always in movement, and the natural water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. Water is always changing states between liquid, vapor, and ice, with these processes happening in the blink of an eye and over millions of years.

edge 22

can someone help with with some answers?! :-) please! i need this done in a hour :-( help!!

Answers

What’s the question?

How does the ionosphere help radio transmission?

Answers

Due to the ability of ionized atmospheric gases to refract high frequency (HF, or shortwave) radio waves, the ionosphere can reflect radio waves directed into the sky back toward the Earth. Radio waves directed at an angle into the sky can return to Earth beyond the horizon.


I hope this helps !

Explanation:

 ionosphere can reflect radio waves directed into the sky back toward the Earth

The elements mercury and bromine are both liquids at room temperature, but mercury is considered a metal, and bromine is considered a non-metal. How can that be? Explain using properties you know of.

Answers

Answer:

At room temperature, mercury and bromine are of fluid consistency, it is because their melting or melting temperature is very low, so low that it reaches room temperature.

Compared to mercury and other metals, the more traditional metals have much higher melting temperatures.

On the other hand, bromine is not a metal, since it does not have the ability to oxidize with the presence of oxygen and also does not give up electrons.

Explanation:

Mercury in the periodic table is Hg, and bromine is Br

Question 16 (6 points)
Match the following elements with the correct answers.
Column A
Column B
a Francium
1.
Which element has the largest electronegativity?
2
Which element has the biggest atomic radius?
b. Nonmetals
3.
C Fluorine
4
From which types of elements is it more difficult
to pull away a valence electron?
Which type of elements has lower ionization
energy?
What element has an oxidation number of +3?
d. Helium
5.
e. Metals
6.
What element has 2 valence electrons?
f. Aluminum

Answers

Answer:

1.) Fluorine

2.) Francium

3.) Nonmetals

4.) Metals

5.) Aluminum

6.) Helium

Explanation:

Convert 48.5 grams of water to moles of water

Answers

Answer:

2.70 mol of water.

Explanation:

divide the given mass by the molar mass of water. 48.5 / 18.016g = 2.70 mol water.

ANSWER ASAP What are the ions present in the compound MgO? * 1
(1 Point)
Mg2+ and O-
Mg2- and O2+
Mg+ and O-
Mg2+ and 02-

Answers

Answer:

mg+ and O-

Explanation:

HOPE IT HELPS

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