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Atoms
Elements
Periodic Table
Chemical Formulas
Periodic Trends
100
Most of the mass of an atom is here.
What is the nucleus?
100
Has atomic number 2.
What is helium?
100
Elements with full valence shells are in this group.
What are noble gases (group 18)?
100
The small numbers that appear after an element and indicate number of atoms.
What are subscripts?
100

Element with the largest electronegativity.

What is Fluorine?

200
Positively charged particle in an atom.
What is a proton?
200
A diatomic element.
What is either hydrogen, nitrogen, oxygen, fluorine, chlorine, iodine, or bromine?
200
Name for elements in Group 1.
What are alkali metals?
200

Formula for Potassium Sulfide

What is K2S?

200

Element with the largest atomic radius.

What is Francium?

300
Protons and Neutrons.
What are particles found in the nucleus of an atom?
300
The only nonmetal on the left side of the periodic table.
What is hydrogen?
300
Classification that indicates number of energy levels.
What are periods?
300

Formula for iodine heptafluoride

What is IF7

300

Group with a large jump in ionization energy after the third IE.

What is Group 13 or 3A?

400
Negatively charged particles found in atoms.
What are electrons?
400
The four primary elements in living things.
What are carbon, hydrogen, oxygen, and nitrogen?
400
Word that indicates repeating patterns.
What is periodic?
400

Name of CaCr2O7

What is Calcium Dichromate?

400

Arrange the following elements in order of increasing ionization energy: S, Na, and Al.

What is Na, Al, and S?

500
An atom that has either lost or gained an electron.
What is an ion?
500
Elements with varying numbers of neutrons.
What are isotopes?
500
Have characteristic of both metals and nonmetals.
What are metalloids?
500

Name of Cr2O3

What is Chromium (III) oxide?

500

Which of the following properties does lithium have a larger value than potassium; Ionization Energy, Atomic Radius, Electronegativity, or Ionic Radius?

What is ionization energy and electronegativity?