Atoms and Ions

Atoms and Ions

Get a Periodic Table ready!

Multiple Choice

Which section of the Periodic Table contains the non-metals?

• The left-hand block only

• The middle block only

• Everything below and to the left of the red line

• Everything above and to the right of the red line

Multiple Choice

The 2nd and 3rd shells can hold a maximum of...

• One electron

• 2 electrons

• 8 electrons

• 10 electrons

Reminder...

• Each type of atom is represented on the Periodic Table by two numbers

• The (smaller) bottom number is called the atomic number

• This tells you how many electrons the atom has

Multiple Select

Which two of these atoms have more than 12 electrons?

• Boron

• Sulfur

• Neon

• Chlorine

In total, this atom has six electrons.

• Its atomic number will be 6.

• Looking on the Periodic Table, we can see that this atom is Carbon.

Multiple Choice

Use your Periodic Table to identify this atom.

• Lithium

• Nitrogen

• Sodium

• Oxygen

Multiple Choice

Use your Periodic Table to identify this atom.

• Argon

• Neon

• Sodium

• Magnesium

Reacting metals and non-metals

Iron + sulfur --> iron sulfide​

Multiple Choice

Why do atoms form ions during chemical reactions?

• To get a full first shell

• To empty their inner shells

• To get a full outer shell

• To become more reactive

Multiple Choice

This atom, neon is a member of the group called the noble gases. Why are the noble gases unreactive?

• Because they already have full outer shells

• Because they have an even number of electrons

• Because they only need to gain one electron

Multiple Choice

How could I write down the electron configuration for this atom?

• 7, 8, 2

• 2, 8, 7

• 17

• 2, 8, 8

Reminder...

• Non-metal atoms gain electrons

• They become negative ions

Multiple Choice

To get a full outer shell, this atom will...

• Gain 1 electron

• Gain 2 electrons

• Lose 1 electron

• Lose 2 electrons

Multiple Choice

How was this ion formed?

• An aluminium atom lost three electrons

• A nitrogen atom lost three electrons

• A nitrogen atom gained three electrons

• A neon atom gained electrons

Multiple Choice

An oxygen atom has reacted to get a full outer shell. What is the correct charge for the ion?

• +

• -

• 2+

• 2-

Multiple Choice

Count the electrons in this atom's outer shell. What will happen when this atom reacts?

• It will gain 2 electrons and become a 2- ion.

• It will gain 3 electrons and become a 3- ion.

• It will lose 5 electrons and become a 5- ion.

• It will gain 3 electrons and become a 3+ ion.

Reminder...

• Metal atoms lose electrons

• They become positive ions

Multiple Choice

This ion was formed when a magnesium atom...

• lost two outer electrons

• gained two outer electrons

• lost one outer electron

• gained 6 electrons

Multiple Choice

This is a lithium atom. To form a lithium ion it must...

• Gain one electron

• Lose one electron

• Gain two electrons

• Lose two electrons

Multiple Choice

Sodium is a metal. It loses one electron when it reacts. The correct chemical symbol for a sodium ion would be..?

• Na⁺

• Na^-

• Na²⁺

• Na₊

Open Ended

This diagram shows what happens when sodium reacts with chlorine to form sodium chloride. You have 3 minutes to describe what happens in as much detail as you can.

Challenge!

Magnesium is a metal with a total of 12 electrons. It can also react with chlorine, but only if there are twice as many chlorine atoms as magnesium. Can you explain why?