Unit 4 Vocab- Atoms

A theory which states that all matter is composed of tiny, indivisible particles called atoms,

where all atoms of a given element are identical, and different elements have different types of atoms which combine in simple whole number ratios to form compounds

• Gravitational Theory

• Dalton's Atomic Theory

• Theory of Evolution

• Germ Theory

a substance that has mass and takes up space

• matter

• atom

• cathode ray

basic building block of all matter composed of protons, neutrons, and electrons

• matter

• atom

• particles

in a chemical reaction mass is neither created nor destroyed

• Lewis dot diagram

• Bohr model

• conservation of mass

a very small quantity or piece of matter

• particle

• matter

• element

the physical property of matter that causes it to experience a force when placed in an electromagnetic field such as positive or negative

• isotope

• neutron

• charge

positively charged particle found in the nucleus of an atom

• electron

• neutron

• proton

negatively charged particle found in orbits around the nucleus

• proton

• neutron

• electron

a particle found in the nucleus but does not have a charge

• proton

• neutron

• electron

part of the atom where protons and neutrons are located

• nucleus

• electron cloud

• atom