2. What was the primary reason in the 1850's driving the curiosity of atoms?
1905-Einstein
1827-Brown

Answers

Answer 1

The primary reason that large numbers of people left Ireland in the 1840s and 1850s was MASS STARVATION.

Great Famine or Great Hunger was a period in Ireland where mass starvation, diseases, and emigration occurred between 1845 to 1852.

The Great Famine was caused by Phytophthora infestans, a disease that infests in potatoes. Though the potato infestation spread throughout Europe, it greatly affected Ireland, where 1/3 of its population was dependent on the potato crop as their primary source of food.

The loss of their primary source of food led to mass starvation, sickness, and eventual death. Others opted to leave Ireland and seek shelter and food in other countries to survive.


Related Questions

A Potassium isotope contains 19 protons, 19 electrons and 21 neutrons. What is its mass number? 40​

Answers

Answer:

17

Explanation:

you add 19+19 the subtract 21. I think

A  potassium isotope contains 19 protons, 19 electrons, and 21 neutrons, so the mass number is 40 as the mass number of the atom is the sum of the protons and the neutrons, the mass number is 40.

What is the significance of the mass number in the atom?

The mass number is significant as it is the sum of the number of protons and neutrons present in nucleus of an atom, which determines the atomic weight of an element and also determines its chemical properties and its position on the periodic table. Isotopes of an element have the same atomic number but a different mass number, so they have different properties than the original element.

Hence, a potassium isotope contains 19 protons, 19 electrons, and 21 neutrons, so the mass number is 40 as the mass number of the atom is the sum of the protons and the neutrons, the mass number is 40.

Learn more about the mass number in the atom here.

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Anybody know about this chem problem, please anything helps.

Answers

Answer:

B

Explanation:

the second option is right

what does the chemical formula Ba(HCO3)2 tell us about number of atoms of each element present​

Answers

Answer: The chemical formula is Ch(HCO3)2 and Cn(HO3)2

Explanation:

There is 1 atom of Ba, 2 atoms of hydrogen, 2 atoms of carbon, and 6 atoms of oxygen.

What are molecules?

The smallest particle of a substance has all of the physical and chemical properties of that substance.

The chemical formula Ba(HCO3)2 tells us about the number of atoms of each element present​ as follows:

1 atom of Ba

2 atoms of hydrogen

2 atoms of carbon

6 atoms of oxygen.

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If you burn a piece of wood, it becomes a different substance. What type of
property is this?
A. Electrical property
O
B. Chemical property
C. Physical property
D. Mechanical property

Answers

Answer:

B. Chemical property

Explanation:

Answer:

B

Explanation:

a reaction has taken place in which you can't get back what you started with

A vial is filled with room temperature water, and blue cold water has been placed at the bottom. A warm water bag sits next to the vial. What do you think will happen?

Answers

Explanation:

In the context, a vial which is used in store medical samples is filled with water at room temperature. And the vial is kept on a cold water. Also a water bag containing warm water is kept near the vial.

The cold water kept at the bottom of the vial is having lower kinetic energy while warm water will have higher kinetic energy than the others. Since the water in the vial is at room temperature and it is in touch with the cold blue water, the water in the vial will loose or give its temperature to the cold blue water through conduction as well as convection process since temperature always flows from a hot body towards the cold body.

On the other hand, the warm water placed next tot he vial will give its temperature to the atmosphere.  

ANALYSIS
1. Why are resources like air and water considered to be at risk, even though
they are considered renewable?

Answers

Answer:

The pollution can cause resources to lessen.

Due to pollution, resources like air and water considered to be at risk, even though they are considered renewable.

What is pollution?

Pollution is the presence on an environment or substance, harmful substances that are dangerous to the living organisms found in that environment.

Water and air pollution is a serious risk to human, animal and plant life in the environment.

Therefore, due to pollution, resources like air and water considered to be at risk, even though they are considered renewable.

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The modern atomic theory has been updated over the years as new observations of the atom have been made. What do these changes say about the strength of the modern atomic theory

Answers

Answer:

The answer is "It updates reinforce the idea, because it has been checked and modified several times, making it longer lasting".

Explanation:

The description of its empirical data throughout the world is a scientific principle. It's also based on facts and is often extensively tested by researchers. Repetitive done by scientists testing helps to enhance its body of knowledge. As just a result of advances in technology, after observation, data collection, and findings evaluation, scientific facts are checked, modified, and verified.

Which of these elements in GroupA on the periodic table has the largest atomic radius?

A.Cesium
B.Rubidium
C.Potassium
D.Sodium

Answers

Answer:

A i think is the answer

Questions
1 Describe two ways in which sodium chloride is different from sodium
frorent from chlorine
chlorine​

Answers

Answer:

The compound composed of these ions exhibits properties entirely different from the properties of the elements sodium and chlorine. Chlorine is poisonous, but sodium chloride is essential to life; sodium atoms react vigorously with water, but sodium chloride simply dissolves in water.

name two liquid fuels obtained from petroleum

Answers

Answer:

Diesel and kerosene.

Hope it helps :)

Answer:

Gasoline

Diesel

Kerosene

LPG

Rethanol

Ethanol

Butanol

What are five ways to identify a chemical reaction

Answers

Answer:

A chemical reaction occurs when a substance is rearranged to form a new substance. It is possible to identify if this has taken place from one of the five signs of chemical change. These changes include color change, temperature change, precipitate formation, gas production and light emission.

Explanation:

hope it helps :))

Answer:

A chemical reaction occurs when a substance is rearranged to form a new substance. It is possible to identify if this has taken place from one of the five signs of chemical change. These changes include color change, temperature change, precipitate formation, gas production and light emission.

hope it helps :)


Which characteristic best explains why gases are more compressible than liquids or solids?
A Gas particles tend to attract one other, while liquid and solid particles tend to repel each other.
B. Gas particles tend to be separated by larger distances than liquid or solid particles are.
C Gas particles tend to move more rapidly than liquid or solid particles do.
D. Gas particles tend to clump together as their temperatures increase

Answers

Answer:B

Explanation:

Answer:This chapter begins the first where we will look at matter on a microscopic scale.  Matter is made of small particles of atoms or molecules.  There are three common states of matter, solid, liquid and gas.  A gas and a liquid will change shape to fit the shape of their container.  A gas will change volume to fit the volume of the container.

Explanation:

In general, solids are denser than liquids, which are denser than gases. . The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other.   Their vibration is related to their kinetic energy.  In the solid the particles vibrate in place.

Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container. The attractive forces between particles are strong enough to hold a specific volume but not strong enough to keep the molecules sliding over each other.

Gas – In a gas, particles are in continual straight-line motion. The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely of each other.  In most cases, there are essentially no attractive forces between particles.  This means that a gas has nothing to hold a specific shape or volume.

(A fourth state of matter, called plasma, exists when a gas becomes ionized. Plasma exists inside stars and in interstellar gases.)

Which of the following most likely explains why the chemical symbol for calcium is Ca?

A. The symbol C was already used for carbon.
B. The symbol was assigned by modern alchemists.
C. Calcium is made of more than one type of atom. ​

Answers

Answer:

it is a latin word, so B

Explanation:

Which is classified as an inner transition element?
a) calcium
b) copper
c) fermium
d) helium

Answers

C) Fermium is the answer

HELP PLZ !!!!! !!!!

Which of these is a sedimentary rock?
A) Granite
B) Obsidian
C )Quartzite
D) Sandstone

Answers

Answer:

D

Explanation:

How should the baking of a pizza be categorized? A) as an exothermic process because the dough releases heat B) as an endothermic process because the dough releases heat C) as an exothermic process because the dough absorbs heat D) as an endothermic process because the dough absorbs heat

Answers

Answer:

D

Explanation:

as an endothermic process because the dough absorbs heat

The baking of a pizza be categorized as an endothermic process because the dough absorbs heat.

What is an Endothermic reaction?

This is the type pf reaction in which heat is absorbed from the surroundings  in a reaction.

During baking, the oven which is the surrounding is usually hot which brings about the dough absorbing the heat. This depicts an  endothermic process and makes option D the most appropriate choice.

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difference between compound and element​

Answers

Answer:

An element is a material that consists of a single type of atom. Each atom type contains the same number of protons. Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.

Explanation:

I hope it helped you

C. A paramecium is a single-celled organism that lives in ponds. It travels at a rate of 2,000 micrometers per second. What is the speed of the paramecium in meters per hour?

Answers

Answer:

7.2 meters per hour

Explanation:

It is given that,

The speed of a paramecium is 2,000 micrometers per second.

We need to find the speed of the paramecium in meters per hour.

We know that,

[tex]1\ \mu m=10^{-6}\ m[/tex]

and

1 hour = 3600 seconds

[tex]v=2000\ \dfrac{\mu m}{s}\\\\=2000\times \dfrac{10^{-6}\ m}{(\dfrac{1}{3600})\ s}\\\\=7.2\ \text{meters/hour}[/tex]

Hence, the speed of the paramecium is 7.2 meters per hour.

The cell organelles that contains chlorophyll​

Answers

organelles are called chloroplasts

Answer:

In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.

Claudia performed a flame test in her lab. The result of her flame test is shown here.

Answers

Answer:

Where is the results and what is the question or is there a picture

Explanation:

Convert 30°C into kelvin

Answers

Answer:303.15

Explanation:

In chemistry she wants to know why to certain items or people shock me?

Answers

Because of static energy you have which is potential energy in something or someone else

is this enough money for this question


A certain type of frog reproduces sexually and has 36 pairs of chromosomes in each of its body cells. How many chromosomes are in each of the frog’s sex cells?

Answers

Answer:

36

Explanation:

Sex cells are different from body cells. Sex cells are made up of haploid number of cells. A haploid cell is half the original number of cell. When sex cell combines, they fuse and unite the half number of cells to form a single diploid which makes a complete body cell by a series of process.
All sex cells only contains half the number of cells in their parent.

Answer:

The answer is 36 on edgenuity.

During dialysis, water and urea pass from the blood into the dialysis fluid. Proteins stay in the blood.
(a) Name the process by which water passes from the blood to the dialysis fluid.
(b) Describe the process you have named in (a).
(c) Explain why water passes out of blood but proteins do not.​

Answers

Answer:

Healthy kidneys clean your blood and remove extra fluid in the form of urine. They also make substances that keep your body healthy. Dialysis replaces some of these functions when your kidneys no longer work. There are two different types of dialysis - hemodialysis and peritoneal dialysis. The following is about hemodialysis.

Terry bought a gold necklace at a pawnshop and was wondering if it was “real” gold. She decided to perform a density test. She placed the necklace in a graduated cylinder of water that had 47.00 mL of water and the water rose to 48.35 mL. She then weighed the necklace and found it to have a mass of 22.89 g. What is the density of Terry’s necklace?

Answers

Answer:

d = 16.96 g/mL

Explanation:

Given that,

Initial water level in graduated cylinder is 47 mL and final water level is 48.35 mL.

The weight of the neclace is 22.89 g.\

We need to find the volume of the necklace. We know that, density equals mass per unit volume. So,

[tex]d=\dfrac{m}{V_f-V_i}\\\\d=\dfrac{22.89\ g}{(48.35-47)\ mL}\\\\d=16.96\ g/mL[/tex]'

Hence, the density of Terry’s necklace is 16.96 g/mL.

Answer:

A

Explanation:

The new mine means the supply is high and the price is low, so she can afford the necklace

What is the total number of protons, neutrons, and electrons in a thallium, TI, atom that has a mass number of 204




Help

Answers

Answer:

Name, Thallium. Symbol, Tl. Atomic Number, 81. Atomic Mass, 204.3833 atomic mass units. Number of Protons, 81. Number of Neutrons, 123. Number of Electrons, 81 ... It has a metallic luster when it is first exposed to air but it tarnish quickly

Explanation:

Hope this helped :)

Neutrons have a
charge?
neutral
negative
positive

Answers

Answer:

Neutrons have a neutral charge

Explanation:

A neutron consists of 3 quarks, 1 up and 2 down. The up quark has a charge of + 2/3e, and the down quarks each have a charge of - 1/3e. So, the charges on the 3 quarks tend to cancel out to produce a neutrally charged particle.

It is a Neutral charge

What is absolute zero? A) The temperature at which the particles of matter are at their lowest energy points. B) The temperature at which the particles of matter are at their highest energy points. C) Other _______________

Answers

Answer:

A) The temperature at which the particles of matter are at their lowest energy points.

Explanation:

Absolute temperature refers to the lowest  possible temperature. At this state,  no heat energy remains in the substance; the energy of the particles are at their lowest energy points.

Is beans in water a suspension colloid or solution

Answers

Answer:

The CORRECT answer is Solution

Explanation:

Since a Colloid is a liquid like substance that cannot be removed from other solids the only possible choice would be a Solution. becuase with a solution you can drain the solution and still get the beans.

In which Group do most of the elements have 8 valence electrons?
A. Transition metals
B. Alkaline earth metals
C. Halogens
D. Noble gases

Answers

The answer would be D. Nobel Gases
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