Topic 7 Groups rates and energy Flashcards Preview

Edexcel GCSE Combined Science (Chemistry) HIGHER > Topic 7 Groups rates and energy > Flashcards

Flashcards in Topic 7 Groups rates and energy Deck (90)
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1

1 What do atoms of the same element have in common?

their atomic number/number of protons

2

2 Roughly how many elements are found naturally?

90 to 100

3

3 In what order are elements arranged in the periodic table?

in order of increasing atomic number

4

4 What do you call the columns in the periodic table?

groups

5

5 What is special about the elements that are in the same group of the periodic table?

similar properties

6

6 What is similar about the electronic configuration of elements in the same group?

same number of outer electrons

7

7 What is formed when a group 1 element reacts with water?

an alkali/metal hydroxide + hydrogen

8

8 What is the charge on the ions of elements in group 1?

1+

9

9 The first two elements in group 1 are lithium and sodium. What is the third element?

potassium

10

10 What name is given to group 1 elements?

the alkali metals

11

11 What happens to the reactivity of the group 1 elements as you go down the group?

it increases

12

12 What is produced when lithium reacts with water?

lithium hydroxide and hydrogen

13

13 Why do alkali metals get more reactive as you go down the group?

the outermost electron is further and further away, and so more easily removed

14

14 What name is given to group 7 elements?

the halogens

15

15 State an example of a group 7 element.

one of: fluorine, chlorine, bromine, iodine or astatine

16

16 What is the state of a substance at room temperature, if it has a melting point of ?7 °C and a boiling point of 59 °C?

liquid

17

17 What ion is in all acid solutions?

H+

18

18 Do metals usually form ionic compounds with other metals, non-metals, neither or both?

non-metals

19

19 State the formula of the compound formed when calcium reacts with bromine.

CaBr2

20

20 What is the name and colour of the only liquid halogen?

bromine, brown

21

21 What does chlorine look like?

pale green gas

22

22 How is the appearance of iodine different from that of the three halogens above it in group 7?

solid and darker/black in colour

23

23 Name the compound formed when hydrogen reacts with chlorine.

hydrogen chloride

24

24 What kind of solution is formed when hydrogen fluoride dissolves in water – acidic, neutral or alkaline?

acidic

25

25 Complete the equation: Ca(s) + Cl2(g)  →

CaCl2(s)

26

26 What ions are present in potassium fluoride?

K+ and FI-

27

27 State one similarity in the electronic configurations of fluorine and chlorine.

same number of outer electrons

28

28 Describe the trend in reactivity of group 7 elements.

decreasing down the group

29

29 What type of reaction occurs between chlorine and potassium bromide?

displacement and redox

30

30 What is formed when chlorine water is added to sodium bromide solution?

sodium chloride + bromine