Classification of Elements and Periodicity in Properties Test

Question 1
1 / -0

Identify the correct ground state electron configuration for $$Cr$$.

A
$$[Ar] 3s^23d^4$$

B
$$[Ar]3s^2 3d^5$$

C
$$[Ar] 4s^2 3d^5$$

D
$$[Ar] 4s^2 3d^4$$

E
$$[Ar] 4s^1 3d^5$$

Question 2
1 / -0

What is the atomic number of the element Ununnilium?

A
$$199$$

B
$$191$$

C
$$119$$

D
$$110$$

Question 3
1 / -0

What is the symbol of atomic number 117 ?

A
Uus

B
Uns

C
Uno

D
Uut

Question 4
1 / -0

Within a period __________ have the largest electron affinities.

A
halogens

B
actinides

C
transition metals

D
group 1A alkali metals

Question 5

1 / -0

Consider the table below, showing several properties of four representative elements, potassium, calcium, sulfur, and chlorine, all from period $$4$$ of the periodic table. Notice that the ionization energies of the nonmetals and the electron affinities of the metals have not bee included.

Atom	Ionization Energy $$\left (\dfrac {kJ}{mol}\right )$$	Electron Affinity $$\left (\dfrac {kJ}{mol}\right )$$	Atomic Radius (pm)	Most Stable Ion	Ionic Radius (pm)
$$K$$	$$419$$	N/A	$$227$$	$$K^{+}$$	$$133$$
$$Ca$$	$$(1) 589$$ $$(2) 1145$$	N/A	$$197$$	$$Ca^{2+}$$	$$99$$
$$S$$	N/A	$$(1) - 201$$ $$(2) + 532$$	$$104$$	$$S^{2-}$$	$$184$$
$$Cl$$	N/A	$$-348$$	$$99$$	$$Cl^{-}$$	$$181$$

Note: $$1 pm = 10^{-10}cm$$
Which of the four compounds listed would have the least exothermic lattice energy?

$$KCl$$

$$K_{2}S$$

$$MgCl_{2}$$

$$MgS$$

Question 6
1 / -0

Elements in the same column/group of the periodic table have similar chemical properties because their atoms have the same_________.

A
number of protons.

B
number electrons.

C
number of valence electrons.

D
atomic mass.

Question 7
1 / -0

Which term describes the tendency of elements to participate in a chemical change process?

A
Ionic radius

B
Reactivity

C
Ionization enthalpy

D
Atomic radius

Question 8
1 / -0

In chemistry lab class, your teacher asks you to find magnesium oxide, $$MgO$$, to use in the experiment. When you go to the stockroom, you realized there is no magnesium oxide available.
Which of the following would be the most suitable replacement?

A
Sodium oxide, $$Na_{2}O$$

B
Calcium oxide, $$CaO$$

C
Carbon dioxide, $$CO_{2}$$

D
Silicon dioxide, $$SiO_{2}$$

Question 9
1 / -0

What would be the IUPAC name of element with a atomic number 120?

A
Unbinilium

B
Unnilhexium

C
Unnilseptium

D
Ununnilium

Question 10
1 / -0

What is the IUPAC symbol for Mendelevium ?

A
Md

B
Mn

C
Me

D
Mv

Submit Test

Classification ...

Question 1

$$[Ar] 3s^23d^4$$

$$[Ar]3s^2 3d^5$$

$$[Ar] 4s^2 3d^5$$

$$[Ar] 4s^2 3d^4$$

$$[Ar] 4s^1 3d^5$$

Question 2

$$199$$

$$191$$

$$119$$

$$110$$

Question 3

Uus

Uns

Uno

Uut

Question 4

halogens

actinides

transition metals

group 1A alkali metals

Question 5

$$KCl$$

$$K_{2}S$$

$$MgCl_{2}$$

$$MgS$$

Question 6

number of protons.

number electrons.

number of valence electrons.

atomic mass.

Question 7

Ionic radius

Reactivity

Ionization enthalpy

Atomic radius

Question 8

Sodium oxide, $$Na_{2}O$$

Calcium oxide, $$CaO$$

Carbon dioxide, $$CO_{2}$$

Silicon dioxide, $$SiO_{2}$$

Question 9

Unbinilium

Unnilhexium

Unnilseptium

Ununnilium

Question 10

Md

Mn

Me

Mv

User

Question Analysis

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.