Atoms, Ions & Chemical Species ..

All atoms of the same element have the same number of_________ but different number of _____________.

• protons-neutrons

• neutrons-protons

• atomic number-protons

• protons-neutrons and mass

An isotope is identified by its atomic mass, which is the total number of__________.

• electrons

• protons

• neutrons

• all of the above

A carbon isotope that has 6 protons and 6 neutrons is identified as carbon-12, where 12 is the atomic mass number. A carbon isotope having 6__________ and 8 ____________, on the other hand is carbon-14.

• electrons - atomic mass

• protons - electrons

• protons - neutrons

• atomic mass - atomic number

¹₁ H , have 1 electron ¿What is the number of protons and the number of neutrons? (Write only the numbers,eg. 9,9)

⁴⁰ K, have 19 electrons, what is the number of protons and neutrons? (Write only the numbers.eg. 9,9)

The atomic masses of two isotopes of Cobalt are 59 and 60. If Cobalt has 27 electrons, what is the number of protons and neutrons in each isotope?

(Write only the numbers in the order in which the questions are presented, whithout space.eg. 9,9;9,9)

What is the relationship between cation:

⁴⁰₂₀ Ca ⁺² and ³⁶₁₆ S ?

• Isotopes

• Isobars

• Isotones

• None of the above

Classify the following species:

a) ⁴⁰₁₉K⁺¹

b) ⁶⁷₃₃As ^-3

(Write the answer in order.eg. yellow banana,red strawberry)

A monovalent anion is isoton with Bromine: ⁸⁰₃₅As and is Isobar with Galium ⁶⁷₃₁Ga. Find the number of electron of the ion.

• 22

• 25

• 27

• 28

• 23

Two isotopes of mass numbers of 40 and 44 have a total of 38 neutrons. Find the number of neutrons in each isotope. (Write only the number. Eg. 100,100)