Vocabulary
Trends
Charges
Challenge
Heavy
100
A horizontal row of elements in the periodic table
What is a period?
100
The modern periodic table is arranged in order of
What is increasing atomic number?
100
A positively charged subatomic particle found in the nucleus of an atom
What is a proton?
100
Atoms or groups of atoms that have an electrical charge due to a different number of protons and electrons
What is an ion?
100
The total number of protons and neutrons in the nucleus of an atom is called the
What is mass number?
200
The amount of energy needed to remove an electron from a neutral atom
What is ionization energy?
200
As you move down a group of the periodic table, atomic size generally
What is increasing?
200
A negatively charged subatomic particle
What is an electron?
200
The subatomic particle that plays the greatest role in determining the physical properties of an element is
What is the electron?
200
The weighted average of the masses of the isotopes of an element is called
What is the atomic mass? (or average atomic mass)
300
The ability of an element to attract electrons when forming a chemical bond
What is electronegativity?
300
The atom with the highest electronegativity on the Periodic Table is
What is flourine?
300
A subatomic particle with no charge and a mass of 1 amu found in the nucleus
What is a neutron?
300
The vertical columns of the periodic table are called
What is groups?
400
The radius of a positive or negative ion
What is ionic radius
400
Which ion has the greater ionization energy: Lithium or Boron
What is Boron?
400
Any atom or group of atoms with a negative charge
What is an anion?
400

Any member of the nonmetallic elements in Group 7A of the periodic table that are extremely reactive is named

What are halogens?

400
The number of protons in the nucleus of an atom of an element is called
What is atomic number?
500
The radius of a neutral atom; one half the distance between two like atoms in a molecule
What is atomic radius?
500
Describe the trend of atomic radius down a group and across a period?
What is the atomic radii increases down a group and decreases across a period?
500
Any atom or group of atoms with a positive charge
What is a cation?
500

Any member of a group of gaseous elements in Group 0 of the periodic table that are inert and unreactive are called

What are Noble gases?

500
Regions around the nucleus of an atom where electrons may be found are called
What is energy levels?
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