Chapter 5 & 6 Revision 9 Science

A salt has which of the following in it?

• A non-metal anion, a metal cation

• A non-metal cation, a metal anion

• At least one hydrogen atom/ion

• One molecule of oxygen

Which one of the following orbits around the nucleus

• Neutron

• Electron

• Proton

• All of these

The products of a combustion reaction include

• fire

• hydrogen gas

• water

• ash

How many electrons can the 3rd electron shell hold?

• 8

• 12

• 16

• 18

What do all acids have?

• Oxygen atom

• Hydrogen atom

• Carbon atom

• A bitter taste

What is the correct equation for Photosynthesis?

• What is that, I don't know

A pH lower than 7 indicates that:

• The substance will react well with metal

• The substance react with fats and lipids to produce a soap

• The substance will contain a salt

• The substance is flammable

In a chemical reaction, which of the following will cause an explosion?

• Oxygen and explosion

• Carbon and oxygen

• Hydrogen and oxygen

• Sodium and potassium

Why do hydrogen ions tend not to exist by themselves (as a single atom)?

What was the conclusion of the emission spectrum experiment?

• Atoms have no electrons

• Electrons move around the nucleus

• Protons move around the nucleus in shells

• Electrons move around the nucleus in shells