Q: Which of the following is the correct calculation for the number of neutrons in an atom?

$\text{Number of neutrons} = \text{Mass number} - \text{Atomic number}$

Question 1

Which of the following statements best explains why graphite and diamond, both made of carbon, have such different physical properties?

Accepted Answer

Graphite and diamond have different arrangements of carbon atoms, resulting in different bonding structures.

Question 2

Which of the following is the correct chemical symbol for magnesium?

Accepted Answer

Mg

Question 3

A neutral atom of calcium (atomic number 20) contains how many electrons?

Accepted Answer

$20$

Question 4

Which group on the periodic table contains the noble gases?

Accepted Answer

Group 8A (18)

Question 5

Which of the following elements is a metalloid?

Accepted Answer

Antimony (Sb)

Question 6

A sample of gallium contains $60.11\%$ $^{69}\mathrm{Ga}$ (mass $= 68.93$ amu) and $39.89\%$ $^{71}\mathrm{Ga}$ (mass $= 70.92$ amu). What is the atomic mass of gallium?

Accepted Answer

$69.72$ amu

Question 7

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 8

Which element is essential for the formation of bones and teeth and is classified as a macromineral in the human body?

Accepted Answer

Calcium (Ca)

Question 9

Given an atom with 17 protons, 20 neutrons, and 17 electrons, what is its atomic symbol?

Accepted Answer

$^{37}_{17}\mathrm{Cl}$

Question 10

Which of the following best describes the location and charge of a neutron in an atom?

Accepted Answer

In the nucleus, with a neutral charge

Question 11

Which of the following elements is a halogen?

Accepted Answer

Chlorine (Cl)

Question 12

A neutral atom of zinc has a mass number of $65$ and an atomic number of $30$. How many neutrons does it have?

Accepted Answer

$35$

Question 13

Which of the following is NOT a property of metals?

Accepted Answer

Low melting point

Question 14

Which of the following elements is named after a famous scientist?

Accepted Answer

Curium (Cm)

Question 15

Which of the following statements about the periodic table is correct?

Accepted Answer

Groups are vertical columns and periods are horizontal rows.

Question 16

Which of the following elements is a nonmetal that makes up a significant portion of the human body?

Accepted Answer

Oxygen (O)

Question 17

Which of the following is the correct calculation for the number of neutrons in an atom?

Accepted Answer

$	ext{Number of neutrons} = 	ext{Mass number} - 	ext{Atomic number}$

Question 18

Which of the following elements is a representative element in Group 2A (2) of the periodic table?

Accepted Answer

Magnesium (Mg)

Question 19

Which of the following is a correct statement about the atomic mass listed on the periodic table?

Accepted Answer

It is the weighted average of all naturally occurring isotopes of the element.

Question 20

Which of the following elements is a transition metal?

Accepted Answer

Silver (Ag)

Atoms and Elements: Structure, Properties, and the Periodic Table

Study Guide - Practice Questions

Study Guide - Flashcards