Chemistry

Question 1

Reactivity down group 7 (the halogens)

Answer 1

The reactivity of Group 7 elements (halogens) decreases down the group

Question 2

Reactivity down group 1(the alkali metals)

Answer 2

The reactivity of Group 1 elements (the alkali metals) increases down the group

Question 3

Alkali metal + water =?

Answer 3

Metal-hydroxide + hydrogen

Question 4

What type of atoms are the noble gases

Answer 4

They are monatomic (they exist as a single atom) and very unreactive

Question 5

Properties of metals

Answer 5

-good conductors of heat and electricity
-Malleable(they can be bent into shapes)
-Ductile(they can be pulled)
-Mostly solid at room temperature
-Shiny or lustrous
-High density(usually)
-They tend to be strong

Question 6

Metal+water=?

Answer 6

Metal hydroxide +hydrogen gas

Question 7

Metal+steam=?

Answer 7

Metal oxide+hydrogen

Question 8

Metal+acid=?

Answer 8

Salt+hydrogen gas

Question 9

What is an ore?

Answer 9

naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them

Question 10

What is displacement?

Answer 10

a less reactive metal is displaced from its compound by a more reactive metal

Question 11

Aqueous

Answer 11

Dissolved in water

Question 12

Giant ionic

Answer 12

Metal+non metal (they form ions)

Question 13

Metallic

Answer 13

Metal+metal

Question 14

Simple covenant

Answer 14

Non metal+non metal (don’t form ions)

Question 15

What forces hold together a positive and a negative ion

Answer 15

Electro-static charge

Question 16

Key properties of ionic compounds

Answer 16

-sharp edges
-high melting point
-soluble
-conducts when dissolved or molten