Column 1
Column 2
Column 3
Column 4
Column 5
100
An atom of this element doesn’t contain any neutrons.
Hydrogen
100
When this atom loses one electron it acquires the electronic configuration of Ne.
Na (Sodium)
100
An atom with a different number of neutrons.
Isotope
100
This element is the most electronegative of the Periodic Table.
Fluorine
100
This element is a liquid at room temperature but it has a very high density.
Hg (Mercury)
200
Name two particles that repel each other.
Cation-cation or anion-anion
200
When an atom of this element gains an electron its electronic configuration is that of Ar.
Cl (Chlorine)
200
How many full electron levels does Sulfur have?
2
200
This type of element has a high melting and boiling points.
Metal
200
A liquid element at room temperature which is a poor conductor of heat and electricity.
Br (Bromine)
300
This type of element is a poor conductor of electricity.
Non-metal
300
Easily drawn into (stretched) wire.
Ductile (metal)
300
Total number of protons and neutrons in the nucleus of an atom.
Mass number
300
Capable of being shaped by hammering or pressure.
Malleable (metal)
300
Who found that atoms are mostly empty space?
Rutherford
400
What are the neutrons in the nucleus for?
To stabilize the nucleus
400
How many electrons does Mg2+ have?
10
400
These electrons are in the most outer energy levels of an atom.
Valence electrons
400
This element differs in colour to others which have similar properties.
Cu or Au (copper or gold)
400
This element is the least electronegative of the Periodic Table.
Cs (cesium)
500
Negatively charged particle that exists in the space around the nucleus.
Electron
500
Name two particles that attract each other.
Cation and anion
500
Two or more elements combined.
Ion
500
Says that atoms will gain, lose, or share electrons in order to have 8 valence electrons.
Octet rule
500
Which type of orbital is being occupied in the case of transition metals? How many of these orbitals are there?
d orbitals. 5.
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