2 b) Group 7 (Halogens)

Question 1

Displacement reaction

Answer 1

Reaction where a more reactive element replaces a less reactive one in its compound

Question 2

Electronic configuration

Answer 2

How the electrons are arranged in the shells in an atom

Question 3

Group

Answer 3

Vertical column in the Periodic Table. All elements in the same group have the same number of outer electrons and similar chemical properties.

Question 4

Halogen

Answer 4

Group 7 elements

Question 5

Shells

Answer 5

Where electrons are found outside the nucleus (also called energy levels)

Question 6

Shielded/screened

Answer 6

Describes how the electrostatic force of attraction on an electron from the nucleus is offset by inner shell electrons as they are shielded/screened.