C1; Atomic Structure & Periodic Table

Question 1

What is an atom

Answer 1

The smallest part of an an element

Question 2

What is a molecule

Answer 2

Two or more atoms chemically bonded together

Question 3

What is the conservation of mass

Answer 3

When during a reaction, the atoms in the reactants are rearranged into different compounds. Therefore mass is never gained or lost in a chemical reaction

Question 4

What is an element

Answer 4

A substance made from only one type of atom

Question 5

What is a compound

Answer 5

A substance made up of only 1 atom

Question 6

What is a mixture

Answer 6

Two or more substances mixed together, but no not react with together. A mixture is not a pure substance

Question 7

What i balancing equations

Answer 7

When you change the amount of molecule in a reaction so that the reactants and the product are equal

Question 8

What are the 5 five methods of separating mixtures

Answer 8

Filtration,crystallisation, simple distillation, fractional distillation and chromatography

Question 9

What is filtration

Answer 9

Using a filter to separate an insoluble solid from a liquid

Question 10

What is crystallisation

Answer 10

When the liquid (solvent) evaporates away leaving the soluble solid crystals (solute) behind

Question 11

What is Simple distillation

Answer 11

Separates a liquid from a solution. The solution is heated, it evaporates and then condenses for collection

Question 12

What is Fractional distillation

Answer 12

Separates multiple liquids from a solution, based on boiling points

Question 13

What is Chromatography

Answer 13

Separation soluble substances from one another

Question 14

Who was John dalton

Answer 14

John dalton proposed atoms are tiny hard spheres that cannot be split and all matter was made of atoms

Question 15

When was the first model of the atom created

Answer 15

In 1805 by John dalton

Question 16

Who was JJ Thomson

Answer 16

Proposed that an atom was a sphere of positive charge with negatively charged electrons spread through it

Question 17

Whats was the name of JJ thomsons model and when was it created?

Answer 17

It was called the plum pudding model and was made in 1897

Question 18

What was the expriment that Ernest Rutherford did

Answer 18

He fired alpha particles at a very thin piece of gold foil

Question 19

What did erenst Rutherford conclude

Answer 19

Because most of the particles went straight through, most of the atom was empty space. And that some of the alpha particles shot back meaning that there was a small nucleus in the centre

Question 20

When did Ernest Rutherford discover the nucleus and what was it called

Answer 20

The nuclear model made in 1909

Question 21

What did Neil’s Bohr discover

Answer 21

He adapted the nuclear model and discovered that electrons orbit the nucleus at specific distances called electrons shells

Question 22

When did Neil’s Bohr discover electron shells

Answer 22

In 1913

Question 23

What did James Chadwick discover

Answer 23

He provided evidence to show the distance of neutrons

Question 24

When did James Chadwick discover the neutron

Answer 24

1932