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Question 1

What is an ion

Answer 1

Either a positively charged atom or a negatively charged atom

Question 2

What is an isotope

Answer 2

Isotopes are forms of an element that have the same number of protons but different numbers of neutrons

Question 3

What is an ionic bond

Answer 3

An ionic bond is formed when electrons are lost and gained by two or more atoms. When atoms lose electrons they become positive ions. When atoms gain electrons they become negative ions.

Question 4

What is a covalent bond

Answer 4

A covalent bond forms when two non-metal atoms share a pair of electrons . The electrons involved are in the outer shells of the atoms. An atom that shares one or more of its electrons will complete its outer shell.

Question 5

Why do elements in a group react in a similar way.

Answer 5

Because they have similar properties

Question 6

First three elements of group 1

Answer 6

Potassium ,sodium, lithium

Question 7

Why are noble gases unreactive

Answer 7

They have the perfect amount of electrons in their shells so don’t need anymore or less electrons so they don’t react.

Question 8

I can Describe how you can show that hydrogen and metal hydroxides are made when Group 1 metals react with water.

Answer 8

All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group. This shows that the reactivity of the alkali metals increases as you go down Group 1.

Question 9

First four elements group 7

Answer 9

Fluorine, chlorine, bromine, iodine

Question 10

What is a halogen displacement reaction

Answer 10

Halogen displacement reactions are redox reactions because the halogens gain electrons and the halide ions lose electrons. When we consider one of the displacement reactions, we can see which element is being oxidised and which is being reduced. bromine + potassium iodide → iodine + potassium bromide.

Question 11

Main properties of halogens

Answer 11

halogens have low melting points and low boiling points. This is a typical property of non-metals. Fluorine has the lowest melting and boiling points. The melting and boiling points then increase as you go down the group.

Question 12

Halogen displacement reaction

Answer 12

A more reactive halogen can displace a less reactive halogen from solutions of its salts