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Atoms, Molecules and Compounds
Periodic Table: Basics
Periodic Table: Challenge
Isotopes (and Ions)
Ions (and Isotopes)
200

This is the smallest particle of matter.

What is an atom

200

What element is located in Group 3 Period 4?

Scandium (Sc)

200

TRUE or FALSE

The periodic table is arranged by increasing atomic number.

TRUE

200

Isotopes are variations of elements that have different numbers of _________.

neutrons

200
Neutral atoms become ions when they gain or lose _________ to become stable.

electrons

400

Atom, molecule or compound?

OH

molecule and/or compound

400

To what family of elements does Flourine belong?

Halogens

400

How many valence electrons does Helium (He) have?

2 valence electrons

400

How many neutrons are there in Oxygen-17?

9 neutrons

400

If Calcium loses 2 electrons what charge will it have?

+2 charge

Ca+2

600

How many atoms of each element are there in the following compound:

C6H12O6

Carbon - 6

Hydrogen - 12

Oxygen - 6

600

Which of the following metals is a liquid (at room temperature)?

Magnesium, Mercury, Bromine, Iron

Mercury

600

What element has 3 energy levels and 6 valence electrons?

Sulfur (S)

600

What is the isotope notation for an element with a mass number of 79 and 35 protons?

Bromine-79

79

   Br

35

600

Give the ion notation for an atom with 13 protons and 10 electrons. 

Al+3

800

TRUE or FALSE

All molecules are compound, but not all compounds are molecules.

FALSE

800

Name the following elements:

W, Sb, K

W - Tungsten

Sb - Antimony

K - Potassium

800

What is the name of the family of elements who have 2 valence electrons?

Alkaline Earth Metals

800

What is the notation for the isotope of Silicon that has 18 neutrons?

Silicon-22

22

   Si

14

800

Choose the correct term to complete the statements:

Metal will [gain/lose] electrons to make [+/-] ions.

Nonmetals will [gain/lose] electrons to make [+/-] ions.

Metal will lose electrons to make + ions.

Nonmetals will gain electrons to make - ions.

1000
How many atoms of each element are there in the following compound?


H2SO4

Hydrogen - 2

Sulfur - 1

Oxygen - 4

1000
What PERIOD do the following elements belong to:


Gold (Au), Uranium (U), Chlorine (Cl)

Gold - 6

Uranium - 7

Chlorine - 3

1000

Why do the elements in Group 15, who have 5 valence electrons, tend to for -3 ions?

They gain 3 electrons in an attempt to become stable (meet the octet rule) - it is easier to gain 3 electrons than to lose 5!

1000

An isotope contains 26 protons, 24 electrons, and 32 neutrons. What is the identity of this isotope?

Iron-58

58

   Fe+2

26

1000

How many protons, neutrons and electrons does the following ion have?

26

   Mg+2

12

protons - 12

neutrons - 14

electrons - 10