chapter 2 Flashcards
1
Q
How many naturally occurring elements are essential to humans?
A
25
2
Q
Anything that occupies space and has mass is called __
A
Matter
3
Q
A measure of the amount of material in an object is called __
A
Mass
4
Q
This subatomic particle has no charge
A
Neutron
5
Q
This subatomic particle has a positive charge
A
Proton
6
Q
__ have the same number of protons, but a different number of neutrons
A
Isotopes
7
Q
__ are formed between oppositely charged ions
A
Ionic bonds
8
Q
What are reactants in a chemical reaction?
A
The starting materials
9
Q
A __ is the smallest unit of matter that still retains the properties of an element
A
Atom
10
Q
This type of bond gives water high surface tension
A
Hydrogen bonds
