atomic structure and the periodic table

Question 1

In an element, all of the atoms are the ______

Answer 1

Same

Question 2

Definition of a Compound

Answer 2

Compounds contain two or more different elements chemically combined in fixed proportions.

Question 3

How do you separate a compound back into its elements??

Answer 3

Use a chemical reaction

Question 4

Definition of mixture

Answer 4

Different elements or compounds but they are not chemically combined

Question 5

To separate a mixture you can use………

Answer 5

Filtration, crystallization, distillation or chromatography

Question 6

What is a molecule?

Answer 6

Any elements chemically combined, even if they are the same element

Question 7

Give an example of a compound

Answer 7

Water

Question 8

Filtration definition

Answer 8

Used to separate an insoluble solid from a liquid

Question 9

What do the state symbols tell us?

Answer 9

Tells us the physical state of the chemical

Question 10

Crystallization

Answer 10

Used to separate a soluble solid from a liquid

Question 11

the state symbol aq stands for what?

Answer 11

Dissolved in water

Question 12

What does the state symbol aq stand for?

Answer 12

aqueous - dissolved in water

Question 13

How can we make crystallization happen faster?

Answer 13

Be gently heating our solution to evaporate the water

Question 14

Insoluble definition

Answer 14

The solid will not dissolve in the liquid

Question 15

State the two types of distilllation

Answer 15

Fractional and Simple

Question 16

Describe the process of simple distillation

Answer 16

1. Evaporate the liquid by heating
2. Condense the vapor back to a liquid by cooling

Question 17

In fractional distillation, we separate a mixture of ___________ liquids

Answer 17

different

Question 18

In what year did scientists discover that atoms contain tiny negative particles ( electrons) ?

Answer 18

1897

Question 19

What did the discovery of electrons tell scientists?

Answer 19

That atoms are not tiny spheres that cannot be divided

Question 20

The discovery of electrons proved that….

Answer 20

atoms must have an internal structure

Question 21

How did the plum pudding model present an atom?

Answer 21

An atom as a ball of positive charge with negative electrons embedded in it

Question 22

What was the purpose of the Alpha Scattering experiment?

Answer 22

To find out if the Plum Pudding model was correct

Question 23

Describe the process of the Alpha scattering experiment:

Answer 23

1. Scientists fired tiny particles at the gold foil
2. The tiny particles are Alpha particles ( positive charge )
3. The scientist found that most of the alpha particles passed straight through the gold foil without changing direction.

Question 24

Deflected meaning

Answer 24

Changed direction

Question 25

What did the scientist work out from the results of the Alpha Scattering experiment

Answer 25

1. Atoms are mostly empty space 2. Center of the atom must have a positive charge Both prove Plum pudding model is wrong

Question 26

The _______ model was created to replace the Plum Pudding model

Answer 26

Nuclear

Question 27

What are group 7 elements called?

Answer 27

Halogens

Question 28

What are group 0 elements called?

Answer 28

Noble gases

Question 29

What are group 1 elements called?

Answer 29

Alkali metals

Question 30

Describe the reactivity of Group 7 elements?

Answer 30

Decreases as you go down the group

Question 31

Describe the reactivity of Group 0 elements?

Answer 31

Unreactive

Question 32

Describe the reactivity of Group 1 elements

Answer 32

Increases as you go down the group