Question | Answer |
Protons and neutrons are in the _______ of the atom. | nucleus |
Anything that has mass and takes up space. | matter |
A mixture in which two or more substances are evenly mixed but not bonded together. | homogeneous mixture |
A mixture in which the substances are not evenly mixed. | heterogeneous mixture |
Two or more atoms that are held together by chemical bonds and act as a unit. | molecule |
Matter with a composition that is always the same. | substance |
Substance made of only one kind of atom. | element |
A small particle that is the building block of matter. | atom |
Substance made of two or more elements that are chemically joined in a specific combination. | compound |
Granite | HE |
Smoke | HE |
Soda | HO |
Brass | HO |
Trail mix | HE |
Air | HO |
Tap water | HO |
Positively charged particle in the nucleus of an atom. | proton |
Region surrounding an atom's nucleus where one or more electrons are often found. | electron cloud |
Negatively charged particle that occupies the space in an atom outside the nucleus. | electron |
One or more atoms of an element having the same number of protons but a different number of neutrons. | isotope |
Region at the center of an atom that contains most of the mass of an atom. | nucleus |
An atom that has a charge because it has gained or lost electrons. | ion |
The number of protons in the nucleus of an atom of an element. | atomic number |
Uncharged particle in the nucleus of an atom. | neutron |
Which particle in an atom has a positive charge? | proton |
Which particle in an atom has no charge? | neutron |
Which particle in an atom has a negative charge? | electron |
Where is the most of the mass of an atom found? | nucleus |