CHEM 1004 - Chapter 3 - Atomic Structure and the Periodic Table

Question 1

The full electron configuration for 34Se is:

Accepted Answer

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4

Question 2

What is the maximum number of electrons that can fit in a d subshell?

Accepted Answer

10

Question 3

Which of the following answers places the elements in order of smallest to largest atomic radius?

Accepted Answer

O,Ge,Tc,Ba

Question 4

Element X has 4 isotopes: 30.5% at 186, 32.4% at 187, 31.1% at 188 and the rest at 189 amu. Solve average atomic mass:

Accepted Answer

187.13

Question 5

The Valence Electrons for 51Sb (Antimony) are:

Accepted Answer

5s2 5p3

Question 6

An electron has a charge approximately 1/2000 that of a proton or neutron:

Accepted Answer

False

Question 7

Which of the following elements is a non-metal?

Accepted Answer

Arsenic

Question 8

An element contains three isotopes: 41.8% at 235 amu, 27.1% at 236 amu and 31.1% at 237 amu. Solve average atomic mass:

Accepted Answer

235.89

Question 9

What Does the "Z" Refer to on an Element's Atomic Symbol?

Accepted Answer

Atomic Number

Question 10

Which of the following elements is a halogen? (Not to be confused with the Australian band "Halogens")

Accepted Answer

Fluorine

Question 11

What Does the "A" Refer to on an Element's Atomic Symbol?

Accepted Answer

Atomic Mass

Question 12

An atom of element X is neutral and has an atomic number of 42 and an atomic mass of 95. It has:

Accepted Answer

42 protons, 53 neutrons, 42 electrons

Question 13

I am in Group IIA. What type of element am I and what is the charge on my common ion?

Accepted Answer

Alkaline earth metal: +2

Question 14

My distinguishing electron is located in an f subshell. What am I?

Accepted Answer

Inner Transition Element

Questions 14