Starter: Atomic Structure/Average Atomic Mass

Front

What is true about a neutral atom?

Back

The number of protons equal the number of electrons.

Front

What is oxygen's atomic number if it has 8 protons?

Back

8

Front

Do Aluminum-27 and an atom with 14 protons and 13 neutrons belong to the same element?

Back

No because they have different number of protons.

Front

What is the charge of the nucleus compared to the electron cloud?

Back

The nucleus is positively charged whereas the electron cloud is negatively charged.

Front

How many electrons and neutrons does a neutral atom of Carbon-13 have?

Back

6 electrons and 7 neutrons.

Front

What is the definition of atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the average atomic mass?

Back

The weighted average of the masses of an element's isotopes.

Front

What is an isotope?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the charge of an electron?

Back

Negatively charged.

Front

What is the mass of a proton?

Back

Approximately 1 atomic mass unit (amu).