Show:
Periodic Table
The Atom
Element Identification
Periods & Groups
Metals, Nonmetals, & Metalloids
100
What number tells you the number of protons and electrons?
Atomic Number
100

What is in the center of the atom?

Nucleus

100
What is the name of element number 1?
Hydrogen
100

What are the horizontal rows called on the periodic table?

periods

100

Which category is found on the LEFT side of the stairs?

Metals

200
How do you figure out the number of neutrons?
Subtract the atomic number from the atomic mass
200
What particle has a positive charge?
Proton
200
What element has an atomic mass of 238.
U, Uranium
200

What are the vertical columns called on the periodic table?

groups

200

Which category makes up the zig-zag/stairs on the periodic table?

metalloids

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

Which one tells the number of valence electrons an atom has?

groups

300

Which category is to the RIGHT of the stairs?

Nonmetals

400
How many liquids are on the periodic table?
2
400
What particle has a negative charge?
Electron
400
Which element has 42 as its atomic number?
Mo, Molybdenum
400

How many valence electrons does aluminum have?

3

400

Which category has low densities, low melting points, dull appearances, low conductivity, and are brittle?

Nonmetals

500
What does the term 'valence electrons' mean? (2 things)
number of electrons on outermost shell, tells how reactive an element is
500
What subatomic particle is not inside the nucleus?
Electrons
500

Which element is located in period 3, group 16?

sulfur or S

500

How many electron clouds does potassium have?

4

500

Which category are semiconductors?

Metalloids