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WorksheetsTIMSS - CHEM 3 - Chemical Change
Total questions: 20
Worksheet time: 7mins
What type of change is occurring when the paper is heated?
Which is a chemical reaction
A banana ripped
ice melting
pencil breaking
paper burning
The Law of Conservation of Mass states
that matter exists in all states and reacts the same
that matter can only be changed into new substances by introducing a catalyst
that matter exists in the same state throughout any chemical change
that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
Which of the following IS a physical change?
Getting a haircut
Rusty metal
sour milk
A compound
Which of these are an ion?
3 protons, 3 neutrons, 3 electrons.
8 protons, 8 neutrons, 8 electrons
2 protons, 3 neutrons, 2 electrons
6 protons, 6 neutrons, 7 electrons
Chemical bonds between metals and nonmetals are called what?
covalent bonds
ionic bonds
metallic bonds
Chemical bonds between nonmetals are called what?
Covalent bonds
ionic bonds
metallic bonds
Metals tend to gain or lose or share electrons forming chemical bonds?
gain
lose
share
Nonmetals tend to do what with electrons when they bond with metals?
gain electrons
lose electrons
share electrons
What happens to the charge of an atom when it loses electrons?
becomes positively charged
becomes negatively charged
becomes neutral in charge
