Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
6 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Atom |
The smallest unit of matter, or of an element made of a central nucleus that contains protons and neutrons a cloud that surrounds the nucleus |
Smallest |
|
|
Elements |
Pure substances that are made up of only one kind of atom all of the atoms have the same number of protons Some of the atoms have different numbers of neutrons These are called isotopes |
Pure substances |
|
|
Molecule |
Two or more atoms combined together Examples: H2 molecular hydrogen the most common way hydrogen exist O2 - molecular oxygen the most common way hydrogen exist N2 -nitrogen gas H2O -2 atoms of hydrogen combine with one atom oxygen |
H2, O2, N2, H2O-2 |
|
|
Compound |
two or more different atoms combined together Other examples CO2 carbon dioxide NACL - sodium Chloride tablet salt C6 H12 O6 Simple sugar |
2 or more |
|
|
Cells |
The smallest unit of life made of an organized group of many different molecules and compounds every living thing is made out of one or more cells |
Every living thing... |
|
|
Question that scientists try to answer |
How does a group of nonliving compounds made of nonliving elements end up being a living cell when they get organized together? |
Nonliving compounds |
