Periodic Table and Metal

Which statement about the trend of atomic number is correct?

• The atomic number increases as you go down the group

• The atomic number decreases as you go down the group

• The atomic number decreases as you across the period

• No clear trend for atomic number in the periodic table

Na is in group 1. What is the charge of Na?

• 2-

• 1-

• 1+

• 2+

What is the charge of Br?

• 2+

• 1-

• 1+

• 2-

Which statement about alkali metals is correct?

• All answers are incorrect

• The melting point of alkali metals decrease as you go down the group

• The melting point of alkali metals increase as you go down the group

• The reactivity of alkali metals decrease as you go down the group

Which statement about halogens is incorrect?

• Fluorine is the most reactive halogen.

• The reactivity of halogens decrease as you go down the group

• The melting point of halogens increase as you go down the group

• The colour of halogens become lighters as you go down the group

Which statement about transition metals is correct?

• They form colour in compounds

• They only have 1 oxidation number

• They have lower density and melting point than alkali metals

• They cannot act as a catalyst

Which statement about noble gases is incorrect?

• Argon has 8 outermost electrons

• Neon has full electronic configuration

• All noble gases are inert

• Helium has 8 outermost electrons

Magnesium reacts with hydrochloric acid to produce .... and ....

• magnesium chloride and oxygen

• magnesium chloride and hydrogen gas

• magnesium chloride and water

• magnesium hydride and hydrogen

What will happen when iodine is added to magnesium chloride?

• black solid is produced

• purple vapor is produced

• green gas is produced

• No reaction (no visible change)

What is the use of the element?

• solvent

• electrical conductor

• insulator

• food wrap