What number tells you the number of protons and electrons?
Atomic Number
100
What is the 'brain' of the atom called? (the center)
Nucleus
100
What is the name of element number 1?
Hydrogen
100
Define matter.
Anything that has mass and takes up space.
100
How many electrons fit on the first energy level?
2
200
How do you figure out the number of neutrons?
Subtract the atomic number (number of protons) from the atomic mass
200
What particle has a positive charge?
Proton
200
What element has an atomic mass of 238.
U, Uranium
200
These are found on the left side of the periodic table.
Metals
200
How many electrons fit on the third energy level?
18
300
How do you find an element's atomic mass?
Add the number of neutrons and the number of protons together
300
What particle has no charge?
Neutron
300
What is the name of the element with the elemental symbol Zr?
Zirconium
300
Elements that have characteristics of both metals and nonmetals.
Metalloids
300
How many electrons fit onto the second energy level?
8
400
What particle has a negative charge?
Electron
400
Which element has 42 as its atomic number?
Mo, Molybdenum
400
What element is a gas with 22 neutrons?
Argon
400
Figure out the number of electrons in each energy level for Iron (Fe)
1st-2
2nd-8
3rd-16
500
What are valence electrons?
Why are they important?
Valence electrons are the number of electrons on outermost shell or energy level. The number of valence electrons determines how reactive an element is.
500
What subatomic particle is not inside the nucleus?
Electrons
500
What element has the elemental symbol Yb?
Ytterbium
500
These are poor conductors of heat and electricity. They are dull in appearance.
Nonmetals
500
How many electrons are in each energy level for the element Chlorine (Cl)