Module 7 - Periodic Properties V5

Question 1

Mendeleev, Meyer, and Moseley’s work in chemistry contributed to the modern periodic table.

Answer 1

true

Question 2

Moseley arranged his periodic table in order of increasing…

Answer 2

atomic number

Question 3

Atomic number is the number of __________ within an atom’s nucleus.

Answer 3

protons

Question 4

The magnitude of the electric charge between two atoms is determined by Coulomb’s law.

Answer 4

true

Question 5

It’s not necessary to factor in the screening constant to solve for effective nuclear charge.

Answer 5

false

Question 6

The screening constant, S, takes into account which electrons from an atom?

Answer 6

core electrons

Question 7

Nonbonding radius is the shortest length separating the nuclei of two atoms during a collision.

Answer 7

true

Question 8

F-1 is smaller than its neutral atom, F.

Answer 8

false

Question 9

Atomic radii increases in a period from __________ to __________.

Answer 9

right; left

Question 10

An ion forms when a neutral atom gains or loses one or more electrons, usually in order to gain stability through bonding.

Answer 10

true

Question 11

Which scientist created the first electronegativity scale?

Answer 11

Linus Paulding

Question 12

Oxygen has a larger electronegativity than fluorine.

Answer 12

false

Question 13

The energy needed to take away an electron from a non-bonded ground state atom or ion is first ionization energy.

Answer 13

false

Question 14

It requires more energy to remove an electron from magnesium than it does to remove an electron from aluminum.

Answer 14

true

Question 15

How are ionization energy and electron affinity related to each other?

Answer 15

they are opposites

Question 16

Alkali metals are group 2 on the periodic table.

Answer 16

false

Question 17

Hydride ions have a charge of −1.

Answer 17

true

Question 18

Metals are usually __________ at room temperature and nonmetals are usually __________ at room temperature.

Answer 18

solid, gas

Question 19

Two scientists, __________ and __________ developed the first classifications of elements that we now know as the periodic table.

Answer 19

Mendeleev; Meyer

Question 20

Dmitri Mendeleev’s version of the periodic table was used to predict the properties of undiscovered elements. One example of this was…

Answer 20

gallium

Question 21

The concept of the atomic number was originated by…

Answer 21

Moseley

Question 22

Reactivity is a key difference between the elements in the first and last columns of the periodic table.

Answer 22

true

Question 23

Which is a physical property used to distinguish metals from other elements?

Answer 23

luster

Question 24

Effective nuclear charge (Zeff) was derived from…

Answer 24

Coulomb’s Law.

Question 25

The strength of the attractive force between a valence electron and the nucleus is decreased by…

Answer 25

shielding

Question 26

A nonbonding radius is the result of two atoms not colliding.

Answer 26

false

Question 27

Based on the periodic trend, which element would have the smallest bonding atomic radius?

Answer 27

chlorine

Question 28

When considering the trend of ionic size, it is important to remember that __________ are larger than their neutral ions and __________ are smaller than their neutral ions.

Answer 28

anions; cations

Question 29

An isoelectronic series is…

Answer 29

a group of ions with the same number of electrons.

Question 30

What is true about the following isoelectronic series? N3-, O2-, F-, Ne, Na+, Mg2+

Answer 30

N3-, O2-, and F- have larger ionic radii than Na+, Mg2+

Question 31

Which element has the greatest electronegativity?

Answer 31

oxygen

Question 32

Which element has the lowest electronegativity?

Answer 32

gold

Question 33

Since Boron has __________ valence electrons, its first ionization energy is __________ than that of Lithium.

Answer 33

more; greater

Question 34

Ionization energy can be negative.

Answer 34

false

Question 35

Zirconium is a strong, durable material that is often used in jewelry such as wedding rings. What is the correct electron configuration for a zirconium ion, ​​Zr2+?

Answer 35

[Kr] 4d2

Question 36

The electron configuration for the neutral atom selenium is 1s22s22p63s23p63d104s24p4. What is the electron configuration after 2 electrons are added (electron affinity)?

Answer 36

1s22s22p63s23p63d104s24p6

Question 37

Rubidium is an alkali metal. Strontium is an alkaline earth metal. What is a fundamental difference between them?

Answer 37

Rubidium is more reactive than strontium.

Question 38

What is one characteristic that distinguishes metalloids from metals?

Answer 38

Metalloids struggle to conduct heat.