Atomic structures

Question 1

What is an element

Answer 1

A element is a atom that all have the same number of protons in their nucleus .

Question 2

Define a compound

Answer 2

A compound is a combination of different elements into a single unit.

Example : water H2O
Carbon dioxide CO2

Question 3

What is an atom?

Answer 3

The smallest single unit of an element

Question 4

Define Proton?

Answer 4

It’s a tiny particle that has a positive charged particle inside the nucleus .

Question 5

What is An electron ?

Answer 5

It’s a negative particle that revolves around the outside of the nucleus

Question 6

Define a neutron?

Answer 6

It’s a particle of matter that has no charge

Question 7

The nucleus of an atom contains 2 particles , what are they?

Answer 7

Protons and neutrons

Question 8

The charge of the nucleus is

Answer 8

Positive

Why ? Because the nucleus of a atom contains protons which is a positive charge.

Question 9

Most of the weight of an atom is in what part of the atom?

Answer 9

In the nucleus

Question 10

Define Matter

Answer 10

Matter is a substance , it’s anything that takes up space

Eg: everything around you -people, cars. All atoms and molecules around you.

Question 11

The size of an atom is determined by the orbit diameter of ?

Answer 11

Electrons around the nucleus

Question 12

What is the number of an atom that explains how many protons are in the nucleus

Answer 12

It’s the Atomic Number

Question 13

How do we determine the atomic mass of an atom

Answer 13

By the total number of neutrons and protons in the nucleus

Question 14

Ernest Rutherford discovered that the nucleus of atoms was very small or very big compared to the size of the atom ?

Answer 14

Very small

Question 15

The early Greek model was made up of what?

Answer 15

Made up of indivisible particles/ units

Question 16

An alpha particle is a
A. big nucleus
B. Helium nucleus
C. Small nucleus

Answer 16

B.Helium nucleus

What does the helium nucleus contain? 2 protons and 2 neutrons

Question 17

What is a beta particle?

Answer 17

It’s a negatively charged particle or

A fast moving electron

Question 18

The periodic table lists atoms in order of increasing numbers , what are these numbers called?

Answer 18

Atomic numbers

Question 19

On the periodic table in what group are the alkaline groups ?

Answer 19

Group 2

Question 20

On the periodic table where are the alkali group?

Answer 20

Group 1

Question 21

What experiment is Ernest Rutherford well known for ?

Answer 21

The gold foil experiment

Question 22

Ernest Rutherford performed a famous experiment by what?

Answer 22

He fired a beam of alpha particles through a gold film , measuring the deflection of particles

Question 23

Five ways to increase the speed of a chemical reaction ?

Answer 23

1. Temperature
2. Concentration
3. Pressure
4. type of reactants

Question 24

When the number of electrons and protons in an atom are different it is no longer an atom , what is it?

Answer 24

A Ion

Question 25

Where are metals located on the periodic table ?

Answer 25

Left side

Question 26

Where are non metals located on the periodic table

Answer 26

Right side

Question 27

Where are Metalloids located on the periodic table

Answer 27

Between the metals and non metals

Question 28

Gases are located in what group on the periodic table

Answer 28

Group 8 on the periodic table which is the right side

Question 29

Adding ice to a chemical reaction will make the reaction slower or faster?

Answer 29

Slower

Question 30

Burning a chemical in the prescience of oxygen is a A. Explosive reaction B. Powdery reaction C. Exothermic reaction D. Combustion reaction

Answer 30

Combustion reaction

Question 31

Isotopes of an element are different ... Why ?

Answer 31

Because they have different numbers of neutrons

Question 32

Carbon dating can only be used on ?

Answer 32

Organic materials

Question 33

What is a Geiger counter used for ?

Answer 33

It detects radiation

Question 34

Three common acids are

Answer 34

Sulfuric acid Nitric acid Citric acid

Question 35

Who invented the periodic table

Answer 35

Dmitri Mendeleev

Question 36

Neutral solutions have a PH equal to? A.3 B.8 C.7 D.1

Answer 36

7

Question 37

Do acidic solutions have a PH level more than 7

Answer 37

No , they have a PH level less than 7

Question 38

Basic solutions have a PH level of more than 7? | True or false

Answer 38

True ... Basic solutions have a PH level more than 7

Question 39

When magnesium is burned in air what new chemical is formed

Answer 39

Magnesium oxide

Question 40

When acid is added to magnesium what gas is produced

Answer 40

Hydrogen | Remember the test for this is called THE POP TEST

Question 41

When acid is added to calcium carbonate what gas is produced

Answer 41

Carbon dioxide

Question 42

A common base is

Answer 42

Sodium hydroxide

Question 43

What is the scientific method used to undertake an investigation Remember ..R A M M R D C

Answer 43

``` Research . Aim Materials Method Results Discussion Conclusion ```

Question 44

The number of electrons and protons in an atom are A . Always the same B. Flammable C. Chemicals

Answer 44

A .always the same

Question 45

What is the scientific method used to undertake an investigation Remember ..R A M M R D C

Answer 45

``` Research . Aim Materials Method Results Discussion Conclusion ```

Question 46

The number of electrons and protons in an atom are A . Always the same B. Flammable C. Chemicals

Answer 46

A .always the same

Question 47

When magnesium loses two electrons from its outmost electron shell what ion and charge does it make

Answer 47

MG2+

Question 48

When magnesium is burned in air the new chemical formed is

Answer 48

Magnesium oxide

Question 49

When acid is added to calcium carbonate what gas is produced?

Answer 49

Carbon dioxide

Question 50

If an equal amount of acid and base are combined a neutralised reaction occurs True or false

Answer 50

True

Question 51

The number of atoms in a molecule of glucose are ?

Answer 51

24

Question 52

Radioactivity is the emission of ? And ? Particles or the emission of ? Waves from an atom

Answer 52

Alpha , beta particles and gamma