Unit 7 Ch 18 Les 1 Atoms FLASHCARDS

Front

In the atom diagram, which part contains protons and neutrons?

Back

nucleus

Front

Which subatomic particle has a positive charge and is found in the nucleus?

Back

Proton

Front

Which statement best defines an element?

Back

A substance made of one kind of atom only

Front

What does the atomic number of an element represent?

Back

The number of protons in its atoms

Front

In the Periodic Table, elements are arranged mainly by increasing ______.

Back

atomic number

Front

Two atoms both have 6 protons. One has 6 neutrons and the other has 7 neutrons. What are these atoms called?

Back

Isotopes of the same element

Front

How is atomic mass (mass number) calculated?

Back

protons plus neutrons

Front

__________ are negatively charged particles that are in the orbitals around the nucleus.

Back

electrons

Front

What are the three major parts of an atom?

Back

Protons, Electrons, and Neutrons