The Atom Vocabulary

This describes particles smaller than the atom

The Law of Conservation of Mass proves?

A positively charged particle identical to a helium nucleus

The exact mass of an atom in atomic mass units

When atoms combine to form compounds, they will combine in simple whole number ratios

Which two scientists had the same mental model of the atom?

Matter can be divided without limit

A positively charge particle

Atoms that have the same number of protons but different numbers of neutrons

Carbon dioxide is always composed of 27.2% C and 72.8% O. This is an example of:

Bohr's model was based on:

The part of the atom that makes up the nucleus

Negatively charged particles

The part of the atom that contains the atoms mass, the dense central portion of the atom

When electrons are in the lowest energy levels possible

The number of wave vibrations per unit time

The number of protons and electrons in a neutral atom

Compounds always have a fixed amount of elements by mass

Matter is made up of tiny particles that cannot be divided into anything smaller

Model of the atom that can determine the probability of locating an electron in an atom

These particle(s) make up an atoms mass

When electrons are in higher energy levels than normal

Makes up all matter

What must electrons do in order to jump to higher energy levels?

The part of the atom where electrons are most likely to be found

This scientist proved that atoms are indestructible

This scientists work provided the foundation for the discovery of the first subatomic particle

The distance between two waves

The Bohr model has how many energy levels?

A mental image that helps explain something that cannot be seen or interacted with

This scientist discovered that atoms are mostly empty space

A part of the atom in which electrons are restricted

Lavoisier discovered this:

The sum of the number of protons and neutrons in an atom

This scientist discovered a nucleus