Vocab
Vocab Plus
Concepts
Concepts Plus
Skills
100
The center of an atom that has most of its mass
Nucleus
100
An energy level containing spinning electrons that surrounds the nucleus of an atom
Energy Shell
100
a positively charged particle in an atom
Proton
100
A neutral particle in an atom
Neutron
100
What is the atomic number of Phosphorus (P)?
15
200
Anything that has mass and takes up space
Matter
200
The smallest unit of an element that has the properties of that element
Atom
200
A negatively charged particle in an atom
Electron
200
What is the chemical formula for water?
200
What is the atomic mass of sodium (Na)?
22.99
300
A pure substance that cannot be broken down into simpler substances through chemical reactions
Element
300
The chemical combination of two or more elements
Molecule
300
What is the chemical formula for salt?
NaCl
300
Is the following a physical (p) or chemical (c) change?
There was a change in state (solid to liquid, liquid to gas, etc.)
Physical
300
How many neutrons are in a chlorine (Cl) atom?
18 neutrons
400
A measure of the amount of matter in an object
Mass
400
A measure of how gravity pulls on an object
Weight
400
Is the following a physical (p) or chemical (c) change?
The substance unexpectedly changed color, became hot, and gave off a weird smell.
Chemical
400
Is the following a physical (p) or chemical (c) change?
A substance bubbled and a new substance was formed.
Chemical
400
How many electrons are in a Lithium (Li) atom?
3
500
A measure of how much space the matter of an object takes up
Volume
500
The amount of matter in a certain volume of a substance; found by dividing the mass of an object by its volume
Density
500
How many naturally occurring elements are there?
92
500
What are 3 characteristics of metals?
They are good conductors of electricity.
They are malleable (can be hammered).
They are ductile (able to be drawn into wire).
500
How many neutrons are in a Magnesium (Mg) atom?
12 neutrons