Ions and isotopes

Question 1

What is an isotope?

Answer 1

It’s a different form of the same element, which have the same number of protons but a different number of neutrons.

Question 2

Where are the atomic numbers and mass numbers placed on an element?

Answer 2

The atomic number is at the bottom and the mass number is at the top.

Question 3

What is an ion?

Answer 3

When a compound is formed from a metal and non-metal, when an atom loses or gains an electron. When lost it becomes a positive ion, when gained it becomes a negative ion.

Question 4

How do you figure out relative atomic mass?

Answer 4

Relative atomic mass = (mass number of isotope 1 x percent abundance of isotope 1) + (mass number of isotope 2 x percent abundance of isotope 2) divided by 100

Question 5

What are the charges of protons, neutrons and electrons?

Answer 5

Proton = relative mass 1, relative charge +1
Neutron = relative mass 1, relative charge 0
Electron = relative mass 1/1850, relative charge -1

Question 6

How is the nucleus charged? What makes up the majority of the atoms mass?

Answer 6

The nucleus of an atom is positively charged, the whole mass of the atom is concentrated in the nucleus.

Question 7

Name three of the polyatomic ions (they consist of more than one atom)

Answer 7

Ammonium NH4)+, Sulfate SO4)2, Carbonate CO3)2-, Hydroxide OH-, Phosphate PO4)3-, Nitrate NO