Vocab
Vocab Plus
Concepts
Concepts Plus
Skills
100
The center of an atom that has most of its mass
Nucleus
100
What is a proton? (what type of charge and where is it found)
Positively charged particle in the nucleus.
100
A negatively charged particle in an atom
Electron
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
Contains both neutrons and protons
Nucleus
200
What is the chemical formula for water?
200
What is the atomic mass of sodium (Na)?
22.99
300
What is an energy shell? How many electrons can each shell hold?
an energy level containing spinning electrons that surround the nucleus of an atom
1st- 2
2nd- 8
3rd - 18
300
What is a Neutron? (what type of charge and where is it found)
Neutral charged particle found in the nucleus.
300
How many elements are on the periodic table?
118
300
Atoms are mostly _________ space.
Empty
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
What does the atomic number represent?
Number of Protons (and electrons)
400
The mass of an atom comes from its _______ and ________.
Protons and Neutrons
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 do you find the atomic mass?
Protons + Neutrons
500
What does AMU stand for?
Atomic Mass Unit
500
How many neutrons are in a Magnesium (Mg) atom?
12 neutrons