An atom has a mass number of 43 and an
atomic number of 23. How many protons
does it have?

Answers

Answer 1

Answer:

23 because the atomic number is base on protons and electrons and the neutrons is 20 hope it help


Related Questions

which element would have properties most like arsenic (As)? Te Ge P Se

Answers

Answer:

P

Explanation:

What element would have this electron configuration:
1s22s22p5

Answers

Answer : fluorine








Mark me as brainliest?❤️

Define a force.......

Answers

Answer:

Gravitational Force.

Gravitation is the agent that gives weight to objects with mass and causes them to fall on the ground when dropped.

Answer:

A force is the strength or energy as an attribute of physical action or movement.

Explanation:

In smaller words, a force is a form of energy caused from a push or a pull on an object. A force happens when two objects interact with each other. For example, when you throw a ball you are using force.

Hopefully this helps im sorry if i got it wrong im kinda dumb... XD

at what temperature does a solid turn into a liquid

Answers

Answer:

0°C

Hope this helps Do mark as brainliest

Answer:

a little over 0 degrease cel

Explanation:

The reaction in which methane is burned, CH4 +202 --> 2H20 + CO2, is an example of a
combustion reaction
O synthesis reaction
O decomposition reaction
O precipitate reaction

Answers

Answer: Combustion

Explanation:

Methane gas or natural gas is the hydrocarbon that reacts with oxygen as shown below: CH4 + 2O2 → CO2 + 2H2O There are two types of combustion reactions: complete and incomplete combustion. Therefore there are four products, carbon dioxide, water, carbon, and carbon monoxide.



The heart is a large
________________
that pumps the blood
throughout the body.

Answers

Muscular organ that pumps blood throughout the body

Explain why warm air temperature has lower air pressure than cold air?

Answers

Answer:

Differences in temperature cause differences in air density. Warmer air is less dense than cold, which is why warm air tends to rise and cold air sinks.

temparature affects particles. warm particles are more spread out.

Explanation:

. Being acted on by gravity, colder, denser air weighs more and exerts greater pressure per unit area.

PE = mgh, solve for m

Answers

Answer:

P.E. = mgh, where m is the mass in kilograms,

Answer:

[tex]m = \frac{PE}{gh} [/tex]

Explanation:

[tex]if \: PE = mgh \\ then \to \\ m = \frac{PE}{gh} [/tex]

♨Rage♨

Sugar is added to iced tea and the contents are stirred until all of the sugar dissolves. How would the tea now be classified?

Answers

By concentrating the mixes of substances

What is the density of an object that has a mass of 62.4 grams and a volume of 7.6 cm 3 ?

Answers

Answer:

d≈8.21 g/cm^3

Explanation:
The density can be found by dividing the mass by the volume.
d=m/v
The mass is 62.4 grams and the volume is 7.6 cubic centimeters.
m=62.4 g
v=7.6 cm^3
Substitute the values into the formula.
d=62.4 g/7.6 cm^3
Divide
d= 8.210526315789474 g/cm^3
Round to the nearest hundredth. The 0 in the thousandth place tells us to leave the 1 in the hundredth place.
d≈ 8.21 g/cm^3

The density of the object is about 8.21 grams per cubic centimeter.

Sodium + oxygen
What colour is the flame produces

Answers

Answer:

Orange

Explanation:

I used google my b

Answer:

ORANGE

explanation:

Small pieces of sodium burn in air with often little more than an orange glow. Using larger amounts of sodium or burning it in oxygen gives a strong orange flame.

NEED HELP PLEASE
Part A:
In your own words, describe the process of a physical change.
Part B:
What is the difference between a physical change and a chemical change? Give an example of each.​

Answers

A/a physical change is when an object goes through a natural change such as weather etc.
B/ the different is that 1) chemical change is more quick to change rather than physical (ex: I’d there is rocks flying around and is wearing down another rock it would take longer rather than acid)

Answer:

Part A:

A physical change is a change of a substance from one form to another without changing its composition.

Part B:

A physical change is a change of a substance from one form to another without changing its composition. Example: A balloon deflating into its original form.

A chemical change occurs, one substance combines with another substance to make something completely new. Example: Making and baking a cake.

mL? PLEASEEE HELP
What is the answer

Answers

22.5 milliliters :)))
22.5 ml is the answer I think

Select the correct answer.
In which situation is no work considered to be done by a force?

A.
when the angle between the force and displacement is 180°
B.
when the angle between the force and displacement is 90°
C.
when the angle between the force and displacement is 45°
D.
when the angle between the force and displacement is 0°

Answers

Answer:

Explanation:

when the angle between the force and  displacement is 0

In a longitudinal wave, particle displacement is

Answers

from google, so I think the answer to that question is the second one

What is the rule of zero charge?

Answers

Answer:

The nonmetal atoms accept electrons and form ions with a negative charge, called anions. When an ionic compound forms, the total charge on the atoms adds up to zero. This is known as the rule of zero charge.

Explanation:

What advances in technology helped usher in the scientific revolution? Choose the best answer.



1.The landing on the Moon by Apollo brought about the scientific revolution.


2.Discoveries by scholars in the Catholic Church revolutionized scientific knowledge.


3.The discoveries by ancient Greek, Muslim and Chinese scientists.


4.The discovery of optics gave scientists instruments such as microscopes and telescopes.

Answers

Answer:

The discovery of optics gave scientists instruments such as microscopes and telescopes.

Explanation:

The period between the 16th-8th century was called the period of the scientific revolution. At this time, the foundations  of our modern science was laid.

One of the characteristic of this period was the emphasis on the scientific method which upheld results from reproducible experiments.

Nicolaus Copernicus, Francis Bacon and Isaac Newton were leading names in this period.

It was within this period that the discovery of optics gave scientists instruments such as microscopes and telescopes and scientific  examination of the celestial bodies was launched.

(b) Define, in terms of oxidation state, the Oxidizing agent
a substance which gains oxygen
a substance whis lose hydrogen
a substance which experiences a decrease in oxidation state
a substance which experiences an increase in oxidation state​

Answers

Answer: a substance whis lose hydrogen

Explanation:

Burning is a type of_________reaction.

O replacement
O decomposition
O synthesis
O combustion

Answers

Answer:

Combustion

Explanation:

Happy Halloween!

Record the length of the object shown.

Answers

Maybe like 7 1/2 ::::::::::::::: oh

Answer: 7.26 mm

I did the test already.

Atomic number is equal to the number of electrons in an atom?.

Answers

Answer:

true I think not sure

Explanation:

HELPPP PLEASEEE!!! calculate the energy of radiation with a wavelength of 432 nm

Answers

Formula:


f = C/λ


Where,

λ (Lambda) = Wavelength in meters

c = Speed of Light (299,792,458 m/s)

f = Frequency (MHz)

answer= 693964023.148148 MHz

Define the concept of Energy in your own words

Answers

Answer:

In general, the word energy refers to a concept that can be paraphrased as "the potential for causing changes", and therefore one can say that energy is the cause of any change. The most common definition of energy is the work that a certain force (gravitational, electromagnetic, etc) can do. Due to a variety of forces, energy has many different forms (gravitational, electric, heat, etc.) that can be grouped into two major categories: kinetic energy and potential energy. According to this definition, energy has the same units as work; a force applied through a distance. The SI unit of energy, the joule, equals one newton applied through one meter, for example. Energy has no direction in space, and is therefore considered a scalar quantity. Energy is a conserved quantity, meaning that it cannot be created or destroyed, but only converted from one form into another. Thus, the total energy of the universe always remains constant. One form of energy can be readily transformed into another; for instance, a battery converts chemical energy into electrical energy.

Explanation:

Classify the following chemical reaction
3 C + 4H2→ C3 H8

Answers

Answer:

Synthesis Reaction

General Formulas and Concepts:

Synthesis Reactions: A + B → AB

Decomposition Reactions: AB → A + B

Single-Replacement Reactions: A + BC → AB + C

Double-Replacement Reactions: AB + CD → AD + BC

Explanation:

Step 1: RxN

3C (s) + 4H₂ (g) → C₃H₈ (s)

We see here that we are combining 2 elements to form a compound.A would be C, B would be H₂, and C₃H₈ would be ABTherefore, we have a Synthesis Reaction

Which of the following is an irreversible physical change?
a) melting a piece of lead
b) sharpening a pencil
c) dissolving sugar into water
d) boiling water

Answers

Answer:

b) sharpening a pencil

Explanation:

If you melt lead, boil water, or dissolve sugar in water, you can return all of them back to their original state. If you sharpen a pencil, you can't reattach the shavings as they were originally.

You may put all of them back to their original states by melting lead, heating water to a boil, or dissolving sugar in water. You cannot rejoin the shavings from a sharpened pencil in their original position. Thus, option B is correct.

What is irreversible physical change?

When something changes physically but not chemically, it has undergone an irreversible physical alteration that cannot be reversed.

Sharpening a pencil is a perfect example of an irreversible physical change. The wood turns to dust when you sharpen it. Just in a different shape, it is still wood. That wood dust cannot be transformed back into a pencil.

You cannot put a piece of paper back together the same way it was before you tore it if you tear it into tiny pieces.

An irreversible alteration is one that cannot be undone or that cannot be returned to its original state, such as when milk turns into curd, iron turns rusty, paper burns, food is cooked, etc.

Therefore, sharpening a pencil is an irreversible physical change

Learn more about irreversible here:

https://brainly.com/question/24111037

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How many electrons does each lithium atom provide to the voltaic cell?
A. 1
B. 2
C. 3
D. 4

Answers

Answer:

c. 3 electrons

Explanation: for the element of LITHIUM, you already know that the atomic number tells you the number of electrons. That means there are 3 electrons in a lithium atom.

The millions of fossils that scientists have collected are called the fossil __.

Answers

Answer:

record

Explanation:

Which describes the motion of the car as shown by the graph?
A) travels at a constant speed
B) not moving
C) changing directions
D) speeding up

Answers

D) speeding up I think

What is involved in weathering?

Answers

Answer:

the answer is water.Hope this helps

Which of the following has a higher electronegativity oxygen or selenium?

Answers

Answer: Oxygen

Explanation: Oxygen has more ionisation energy and Oxygen has a small size which makes it more electronegative.

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