Particles

Question 1

What is an Atom?

Answer 1

They are the smallest particles of elements, which are made of protons, neutrons and electrons

Question 2

What is an Element?

Answer 2

They consist of the same type of atoms and can’t be broken down into simpler substances

Question 3

What is a Compound?

Answer 3

Different elements chemically combined

Question 4

What is a Mixture?

Answer 4

Combined chemicals which can be separated by physical means

Question 5

What are Molecules?

Answer 5

Are a group of atoms made of atoms combined

Question 6

How many states does matter exists in?

Answer 6

3 states

Question 7

What is a Solid?

Answer 7

These particles are tightly together and slightly move

Question 8

What is a Liquid?

Answer 8

There particles move fast and past each other (kinetic energy)

Question 9

What is a Gas?

Answer 9

There particles are far apart and move rapidly colliding with each other (kinetic energy)

Question 10

When do states change?

Answer 10

States change when the substances is cooled or heated

Question 11

When a solid is heated does it gain or lose kinetic energy?

Answer 11

Gains kinetic energy and the particles move faster

Question 12

When changing from a solid to a liquid do bonds break?

Answer 12

Yes

Question 13

What is :
Gas to a solid
Solid to a gas
Gas to a liquid
Liquid to a gas
Solid to liquid
Liquid to gas

Answer 13

Reverse sublimation
Sublimation
Condensation
Evaporation
Melting
Freezing

Question 14

Who made the plum pudding model and in what year?

Answer 14

J J Thomson in 1897

Question 15

What scientist said that an atom has a nucleus and what year?

Answer 15

It was Ernest Rutherford in 1911

Question 16

Who and what year was the discovery of the arrangement of electrons?

Answer 16

Niels Bohr in 1913

Question 17

What is the first 3 shells electron configuration?

Answer 17

2, 8, 8

Question 18

What is Physical change?

Answer 18

Reversible, no new substance is formed

Question 19

What is Chemical change?

Answer 19

Not reversible, new substance is formed

Question 20

What are properties of a solid?

Answer 20

Atoms are packed close together, atoms are arranged in a regular pattern, atoms do not move freely, atoms are held together by bonds, all solids are hard in nature

Question 21

What are the properties of a liquid?

Answer 21

Atoms are packed close together but not as tight as solids, atoms are arranged randomly, bonds hold atoms together but not as strong as solids so atoms move freely, they take the shape of the container they are in

Question 22

What are the properties of a gas?

Answer 22

Atoms are very far apart, atoms move around randomly, they take the shape of the container they are in, they can be compressed and squeezed

Question 23

What is the nucleus made out of?

Answer 23

Protons and neutrons

Question 24

What do the electrons orbit around on?

Answer 24

Shells

Question 25

Is the number of protons the same as electrons or neutrons?

Answer 25

Electrons

Question 26

What is dissolving?

Answer 26

When a solute (solid) diffuses (spreads) through a solvent. ( a liquid in which the solid spreads)

Question 27

What is a solution?

Answer 27

A solute which has diffused throughout a solvent

Question 28

What is melting?

Answer 28

A process in which a solid changed state to a liquid