The Atom Flashcards
(7 cards)
1
Q
Define Chemistry.
A
Focuses on the properties and reactions of matter. It all starts with the atom.
2
Q
What is an atom?
A
The smallest particle into which an element can be divided and still be the same element.
3
Q
What is an element?
A
A substance that cannot be separated or broken down into simpler substances by chemical means.
4
Q
What are the parts of an atom?
A
Atoms are made up of protons, neutrons, and electrons.
5
Q
What is atomic number?
A
The number of protons in the nucleus of an atom.
6
Q
What are isotopes?
A
Isotopes are atoms of the same element that have different numbers of neutrons.
7
Q
What is atomic mass number?
A
The total number of protons and neutrons in an atoms nucleus.
