Unit 1: Atomic Structure & Theory

Front

What is an isotope?

Back

An atom with a different number of neutrons.

Front

How do you find the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

What is the charge of an atom that has lost one electron to become stable?

Back

+1

Front

A neutral atom of Carbon-13 has ________ electrons and _________ neutrons.

Back

6 electrons and 7 neutrons.

Front

What is the average atomic mass of an element with two isotopes: 10.013 amu (19.9% abundant) and 11.01 amu (80.1% abundant)?

Back

10.812, Boron.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is a cation?

Back

A positively charged ion formed when an atom loses one or more electrons.

Front

What is an anion?

Back

A negatively charged ion formed when an atom gains one or more electrons.

Front

What is the electron configuration of a neutral carbon atom?

Back

1s² 2s² 2p².