Complete all questions, and do not leave any blanks. Double check your answers when you have completed.
Required
1
Required
1
Required
1
Required
1
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Required
1
Question 21
21.
Sodium chloride is formed when sodium and chlorine combine together in a chemical reaction. Write the symbols for Sodium and Chlorine
Sodium _______
Chlorine _______
Required
2
Question 22
22.
The reactions of chlorine and bromine with some sodium salts are given on the left.
Use these observations to put the elements bromine, chlorine and iodine in order of reactivity.
Most reactive _______
_______
Least reactive_______
Required
3
Question 23
23.
Newlands’ periodic table was not accepted by most chemists in 1866.
Suggest reasons why.
Use the Newlands’ periodic table above to help you to answer this question.
Required
2
Question 25
25.
Explain why Mendeleev's periodic table was more widely accepted by scientists than previous periodic tables
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Which of these diagrams shows the particles in a compound?
Question 5
5.
Question 6
6.
8Fb 2. Which of the following is a chemical change?
Question 7
7.
Question 8
8.
8Fb 4. Which of the following could have the formula XY₂?
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Question 15
15.
Question 16
16.
Question 17
17.
Question 18
18.
Question 19
19.
Question 20
20.
Question 24
24.
State and explain one way in which Mendeleev improved Newlands’ periodic table.
When magnesium ribbon reacts with steam, a solid called magnesium oxide and hydrogen gas are formed. In this reaction, which element has the lowest boiling point?
A) hydrogen
B) water
C) magnesium
D) magnesium oxide
The correct symbol for carbon is:
A) C
B) Ca
C) Car
D) ø
According to Dalton’s theory, elements:
A) are always solids.
B) contain only one kind of atom.
C) can be split up into simpler substances.
D) contain at least two different kinds of atom.
8Fb 1. The main difference between a chemical change and a physical change is that in a chemical change you always get:
A) a change of state.
B) heat given out.
C) a change in colour.
D) a new substance being formed.
8Fb 3. Which of the following always happens during a chemical reaction?
A) Compounds react and split up into free atoms.
B) Elements join together to make new elements.
C) Atoms are broken down into smaller particles.
D) The atoms in the reactants are rearranged to make the products.
8Fc 1. Which two elements in the periodic table below would have the most similar chemical properties?
A) 1 & 4
B) 2 & 3
C) 1 & 6
D) 5 & 6
8Fc 2. Which element is very unreactive?
A) helium
B) lithium
C) hydrogen
D) fluorine
8Fc 3. Which of the following describes a Group 1 element?
a very reactive metal
a very unreactive metal
a very reactive non-metal
a very unreactive non-metal
8Fc 4. The elements are arranged in the periodic table in order of increasing:
density
reactivity
melting point
atomic number
8Fd. The melting point of a substance is:
A
B
C
D
8Fd 2. Which of the following substances will be a liquid at 350°C?
