Quiz about Chemistry Quiz

Question 1

An unknown element has 10 protons. Which one of the following statements is true about the element?

Accepted Answer

The element belongs in row 2 of the periodic table and is classified as a noble gas.

Answer

The element belongs in row 1 of the periodic table and is classified as a noble gas.

Answer

The element belongs in row 2 of the periodic table and is classified as a halogen.

Answer

The element belongs in row 3 of the periodic table and is classified as an alkali metal.

Question 2

The list describes characteristics of four different elements: Element A is a liquid at room temperature. Element B is a solid that does not conduct electricity. Element C is a gas with an effective nuclear charge of +1. Element D is ductile and can be drawn into wires. Based on this list, which elements are metals?

Accepted Answer

Elements A and D

Answer

Elements A and B

Answer

Elements B and C

Answer

Elements C and D

Question 3

Halogens are known for their high ______ because they readily ______ electrons to achieve a stable configuration.

Accepted Answer

reactivity; gain

Answer

stability; lose

Answer

inertness; gain

Answer

reactivity; lose

Question 4

Arrange the following Group 1 elements in order of increasing atomic size, starting with the smallest:

Accepted Answer

Li; Na; K; Rb; Cs

Answer

Cs; Rb; K; Na; Li

Answer

Na; Li; K; Cs; Rb

Answer

Rb; Cs; Na; Li; K

Question 5

Which list arranges the elements Na, Li, K, Rb, and Cs in order of decreasing ionization energy (from left (highest) to right (lowest))?

Accepted Answer

Li; Na; K; Rb; Cs

Answer

Cs; Rb; K; Na; Li

Answer

Cs; Li; Na; K; Rb

Answer

Na; Li; K; Rb; Cs

Question 6

With the exception of He, how many valence electrons do noble gases have?

Accepted Answer

8

Answer

3

Answer

4

Answer

6

Question 7

Beryllium is in Group 2A, Period 2 of the periodic table. Which statement describes the charge of the ion it typically forms?

Accepted Answer

It forms a cation with +2 charge.

Answer

It forms a cation with a +1 charge.

Answer

It forms an anion with a -2 charge.

Answer

It forms an anion with a -1 charge.

Question 8

Consider the elements Rb, Sr, Te, Xe, and In, which are all found in Period 5 of the Periodic Table. Which sequence, from left to right, arranges them by atomic size, from largest to smallest?

Accepted Answer

Rb; Sr; In; Te; Xe

Answer

Rb; Sr; Te; Xe; In

Answer

Sr; In; Rb; Xe; Te

Answer

Rb; Xe; Te; Sr; In

Question 9

Which element has 2 energy levels and is a noble gas?

Accepted Answer

Ne

Answer

He

Answer

Ar

Answer

Kr

Question 10

Which element from the list has the highest electronegativity and the largest atomic radius?

Accepted Answer

F

Answer

Cs

Answer

O

Answer

Mg

Answer

Rn

Question 11

Out of the list given, what element has the highest electronegativity?

Accepted Answer

F

Answer

Cl

Answer

At

Answer

Li

Answer

Fr

Question 12

Which statement(s) would be expected to be true for Oganesson?

Accepted Answer

Both A and C.

Answer

It is relatively unreactive.

Answer

It has a low ionization energy.

Answer

It has a full valence shell of electrons.

Answer

It has the largest atomic radius of the four new elements.

Question 13

Which of the following elements is most likely to lose electrons and form positive ions?

Accepted Answer

Nh

Answer

Ts

Answer

Mc

Answer

Og

Question 14

The fact that the four new elements are Period 7 of the table means that they all:

Accepted Answer

have seven shells (energy levels) of electrons

Answer

have seven valence electrons

Answer

form ions with charges of 7+

Answer

have an effective nuclear charge of 7+

Question 15

Metals are malleable which means they can be hammered into thin sheets.

Accepted Answer

True

Answer

False

Question 16

The noble gases tend not to form compounds due to having a filled outer shell.

Accepted Answer

True

Answer

False

Question 17

Why does the chloride ion (Cl-) have a larger radius than the chlorine atom (Cl)?

Accepted Answer

Gain of an electron increases electron-electron repulsion, leading to a larger radius.

Answer

Loss of an electron reduces electron-electron repulsion, leading to a smaller radius.

Answer

The addition of a proton increases the nuclear charge, reducing the radius.

Answer

The loss of a proton decreases the nuclear charge, increasing the radius.

Question 18

When fluorine (F) gains an electron, 328 kJ of energy is released (exothermic process). If neon (Ne) gains an electron 29 kJ of energy has to be added (endothermic process). Why does this occur in both atoms?

Accepted Answer

Fluorine has a high electron affinity due to its high electronegativity and small atomic size, making it energetically favorable to gain an electron. Neon, being a noble gas with a stable electron configuration, resists gaining an electron, requiring energy input.

Answer

Fluorine and neon both have high electron affinities, but neon's electron configuration is more stable, making it energetically favorable to gain an electron.

Answer

Both fluorine and neon have low electron affinities, but fluorine's larger atomic size makes it more likely to gain an electron.

Answer

Neon has a higher electron affinity than fluorine, but its larger atomic size makes it less likely to gain an electron.

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