C3.1 The Periodic Table Flashcards Preview

GCSE Chemistry AQA > C3.1 The Periodic Table > Flashcards

Flashcards in C3.1 The Periodic Table Deck (21):
1

John Dalton and Mendeleev arranged their periodic table in order of...

atomic mass

2

The modern periodic table is arranged in order of...

atomic number (proton number)

3

Explain why Mendeleev left gaps in the periodic table...

For undiscovered elements
To make the pattern fit

4

Explain why Sodium and Potassium are in group one of the periodic table

They both have one electron in their outer shell
They both react similarly

5

Describe how alkali metals react with water

-Bubble/Fizz/Effervesce
-Turn universal indicator purple
-Move about on the surface of the water
-Sodium melts into a ball
-Potassium burns with a lilac flame

6

Name the two products made when sodium reacts with water

Sodium hydroxide and hydrogen

7

Write a symbol equation for the reaction of sodium with water

2Na + 2H20 --> 2NaOH + H2

8

Name the typical properties of transition metals

-Good conductors of heat and electricity
-Hard and strong
-High density
-High melting point
-Form coloured compounds
-Form ions with different charges (i.e. Fe2+ and Fe3+)

9

Name one similarity and one difference between the properties of copper and lithium

Similarities - Conduct electricity
Differences - Lithium more reactive, lithium less dense, lithium softer, lithium has lower melting point

10

Describe the trend in reactivity of group 1 metals as you go down the group

Reactivity increases

11

Describe the trend in melting point as you go down group 7

Melting point increases (Fluorine is a gas, Iodine is a solid)

12

Describe the trend in reactivity as you go down group 7

Reactivity decreases

13

Explain why chlorine and bromine are in group 7 of the periodic table

Both have 7 electrons in their outer shell

14

Finish the following word equation
Bromine + Potassium Iodide-->

Potassium Bromide + Iodine

15

Explain why chlorine can displaced bromine from potassium bromide

Chlorine is more reactive

16

Name the ion that turns universal indicator purple

-OH,sup>-
-Hydroxide

17

In terms of electrons state what is meant by reduction

Gain of electrons

18

In terms of electrons state what is meant by oxidation

Loss of electrons

19

Explain why potassium is more reactive than sodium

-Potassium has a greater atomic radius/more energy levels/more shells
-there is less attraction between the outer electron and the nucleus/more shielding
-Potassium loses an electron easier

20

Explain why fluorine is more reactive than chlorine

-Fluorine has a smaller atomic radius/less energy levels/less shells
-there is greater attraction between the outer shell and the nucleus/less shielding
-fluorine gains an electron easier

21

Name one use for the transition metals

Catalysts