GCSE Chemistry Atomic Structure and the periodic table

Question 1

Before the discovery of protons, neutrons and electrons, scientists attempted to classify the elements by arranging them

Accepted Answer

In order of their atomic weight

Question 2

Magnesium + bromine —>

Accepted Answer

Magnesium bromide

Question 3

Cr, Mn, Fe, Co, Ni, Cu are

Accepted Answer

Transition metals

Question 4

The majority of elements are

Accepted Answer

Metals

Question 5

Sodium + oxygen —>

Accepted Answer

Sodium oxide

Question 6

Metal + halogen —>

Accepted Answer

Metal halide

Question 7

Define mass number

Accepted Answer

Number of protons + neutrons

Question 8

When alkali metals react with water what observation do you only see with potassium?

Accepted Answer

Lilac flame

Question 9

Hydrogen + chlorine—>

Accepted Answer

Hydrogen chloride

Question 10

Transition metals are known for....

Accepted Answer

Ions with different charges, form coloured compounds, used as catalysts

Question 11

What do you observe when sodium reacts with chlorine ?

Accepted Answer

Bright yellow light

Question 12

Halogens are

Accepted Answer

Diatomic (pairs of atoms)

Question 13

What does the nucleus contain ?

Accepted Answer

Protons and neutrons

Question 14

What is the electron structure of a potassium atom?

Accepted Answer

2,8,8,1

Question 15

As you go down group 1 (alkali metals), the reactivity ......

Accepted Answer

Increases

Question 16

The discovery of the electron led to the plum pudding model. What did the plum pudding model suggest?

Accepted Answer

Atom is a ball of positive charge with negative electrons embedded in it

Question 17

Group 0 (noble gases) are unreactive because ....

Accepted Answer

They all have 8 electrons in their outer shell except helium which has 2

Question 18

Going down group 0 (noble gases) the boiling point

Accepted Answer

Increases

Question 19

Atoms are very small and have a radius of what size?

Accepted Answer

0.1nm

Question 20

The alpha particle scattering experiment led to what conclusion?

Accepted Answer

Mass was at the centre of the atom and the nucleus was charged

Question 21

What is the relative atomic mass of chlorine? (25% chlorine-37, 75% chlorine-35)

Accepted Answer

35.5

Question 22

Group 0 (noble gases) are

Accepted Answer

Unreactive

Question 23

Which reaction happens ?

Accepted Answer

Magnesium chloride + fluorine

Question 24

The experimental work of James Chadwick led to the discovery of which sub atomic particle?

Accepted Answer

Neutron

Question 25

Define Atomic number

Accepted Answer

Number of protons

Question 26

Elements in the periodic table are arranged in order of.....

Accepted Answer

Atomic number

Question 27

Why did Mendeleev leave gaps in the periodic table?

Accepted Answer

Some elements hadn’t been discovered

Question 28

Period number =

Accepted Answer

Number of shells

Question 29

Alkali metal + water —>

Accepted Answer

Metal hydroxide + hydrogen

Question 30

In an atom the number of protons is equal to

Accepted Answer

Number of electrons

Question 31

Which sub atomic particle has no charge?

Accepted Answer

Neutrons

Question 32

Group 1 (alkali metals) all have how many electrons in their outer shell?

Accepted Answer

1

Question 33

What is a halogen displacement reaction ?

Accepted Answer

A more reactive halogen can displace a less reactive halogen in a compound

Question 34

As you go down group 7 (halogens) the reactivity.....

Accepted Answer

Decreases

Question 35

How many neutrons in carbon-13?

Accepted Answer

7

Question 36

Elements that react to form positive ions are

Accepted Answer

Metals

Question 37

What is an isotope?

Accepted Answer

Atoms with the same number of protons but different number of neutrons

Question 38

Why do elements in the same group have similar chemical properties?

Accepted Answer

Same number of electrons in the outer shell

Question 39

As you go down group 7 the melting point and boiling point...

Accepted Answer

Increase

Question 40

Elements with similar properties are in the same.....

Accepted Answer

Group

Question 41

How many electrons do halogens have in their outer shell?

Accepted Answer

7

GCSE Chemistry Atomic Structure and the periodic table

Questions 41

GCSE Chemistry Atomic Structure and the periodic table

Questions 41