Atomic Structure Test Review

The nucleus of an atom is

When the atomic number equals the number of electrons, the atom is said to be _____.

The number 80 in the name bromine-80 represents

Provided experimental evidence that all matter is comprised of indivisible particles called atoms

The mass of a single atom is measured in ____.

Which of these statements is false?

Anions are formed by electrons being _____.

Used the deflection angles of alpha particles to describe the nucleus of an atom

The group of elements that tend to gain electrons

Which of these statements is not true?

Cations are formed by electrons being _____.

Like charges ____ each other.

An atom with atomic number 48 and mass number 120 contains (assume not an ion)

Which of the following is not a part of Dalton’s atomic theory?

The person who gave the atom its name

Saw that particles in a gas were attracted to the positive plate of the cathode ray

Atomic mass is an average of the element’s ____.

Electrons are arranged in ___ around the nucleus.

The first scientist who thought about atoms

The name of the type of ion when electrons are lost.

Said that an atom is mostly empty space

Said that atoms combine in whole number ratios

Isotopes have the same number of protons but have different number of ____.

The group of elements that tend to lose electrons

An atom or group of atoms with a positive or negative charge

Discovered the proton