Matter and atoms (review)

Which term describes two or more atoms that are held together by chemical bonds and act as a unit?

• atom

• compound

• molecule

• substance

Which term refers to two or more substances that are blended but are not chemically bonded?

• compound

• element

• mixture

• molecule

Matter can be classified as two different things what are they?

• Mixtures and substances.

• Substances and elements.

• Elements and mixtures.

• Matter and atoms.

What do we call a substance that consists of only one type of atom?

• Atom

• Element

• Compound

• Substance

A mixture in which two or more substances are evenly mixed but are not bonded togather is?

• A homogeneous mixture.

• A heterogeneous mixture.

• A mixture.

• A solution.

Which term refers to the region surrounding an atoms nucleus where one or more electrons are most likely to be found?

• electron cloud

• ion

• isotope

• proton

Which term describes one of two or more atoms of an element having the same number of protons, but a different number of neutrons?

• atomic number

• ion

• isotope

• molecule

Because electrons are negatively charged, a neutral aton that has lost an electron has what kind of charge?

• positive

• negative

• neutral

• atomic

Which describes the region at the centre of an atom that contains most of the mass of the atom?

• proton

• nucleus

• neutron

• electron

Which term refers to matter that can vary in composition?

• compound

• element

• mixture

• solvent