Chem A vocab

a negatively charged particle that occupies the space in an atom outside the nucleus

• isotope
• electron
• proton
• neutron

a positively charged particle in the nucleus of an atom

• electron
• ion
• proton
• neutron

a substance made of only one kind of atom

• element
• nucleus
• isotope
• ion

the region at the center of an atom that contains most of the mass of the atom

• nucleus
• atomic mass
• electron cloud
• ion

a small particle that is often called the building block of matter

• isotope
• ion
• neutron
• atom

an uncharged particle in the nucleus of an atom

• neutron
• electron
• proton
• isotope

the number of protons in the nucleus of an atom of an element

• isotope
• ion
• atomic mass
• atomic number

atoms of an element with the same number of protons but a different number of neutrons

• ion
• atom
• isotope
• neutron

an atom that has a charge because it has gained or lost electrons

• isotope
• ion
• neutral
• element

Which row shows only single atoms?

• Top
• Bottom
• Both
• Neither