Atomic structure Practice Questions

Question 1

Which neutral atom has 10 protons, 11 neutrons, and 10 electrons?

Answer 1

• proton = atomic #
• neon

Question 2

A neutral atom of Ca has 2 electrons in its outer shell. What does it to do to form an ion?

Answer 2

• not very many valence electrons, so more prone to losing the 2 electrons and forming a 2+ cation to have a full valence shell

Question 3

A fluoride ion with a 1- charge has ___ protons and ___ electrons.

Answer 3

• protons = atomic #= 9
• charge = protons + electrons , so -1 = 9 + (-10), so 10 electrons

Question 4

An ion with 18 protons, 21 neutrons, and 16 electrons has a charge of ___ and an atomic mass of ____

Answer 4

• charge = proton + electrons [ 18-16= 2+]
• amu = proton + neutrons [18+21= 39]

Question 5

What is a good conductor of electricity but is NOT malleable?

Answer 5

a block of graphite [one of the 3 natural forms of carbon]

Question 6

What are 3 elements that are good conductors AND also malleable?

Answer 6

copper, silver, gold

Question 7

What is the correct number of protons, neutrons, and electrons for the given isotope?

16
O -2
8

Answer 7

• protons = atomic number = 8
• neutrons = mass number - number of protons = 16-8= 8
• electrons [ protons + electrons = charge], so 8+ _ = -2 ; -10

Question 8

How many protons, neutrons, and electrons does Al ion with a 3+ charge have?

Answer 8

• protons = atomic number = 13
• neutrons = mass # - # of protons = 27-13= 14
• electrons [ protons + electrons = charge], so 13 + _ = +3; -10, so 10 electrons

Question 9

If more energy is required to remove a valence electron from an atom, then the IE ____

Answer 9

increases