Question 1

Which subatomic particle is responsible for the identity of an element, and what is its charge?

Accepted Answer

Proton; charge of $+1$

Question 2

A neutral atom of aluminum-27 ($^{27}_{13}\mathrm{Al}$) contains how many protons, neutrons, and electrons?

Accepted Answer

$13$ protons, $14$ neutrons, $13$ electrons

Question 3

Which of the following ions has 28 electrons, 35 neutrons, and a $+2$ charge?

Accepted Answer

$^{63}\mathrm{Cu}^{2+}$

Question 4

Which element in the first column of the periodic table has the greatest atomic mass?

Accepted Answer

$\mathrm{Fr}$

Question 5

Calculate the atomic mass of gallium if it has two naturally occurring isotopes: $^{69}\mathrm{Ga}$ (60.11%, 68.926 amu) and $^{71}\mathrm{Ga}$ (39.89%, 70.924 amu).

Accepted Answer

$69.72$ amu

Question 6

Which of the following elements is a metalloid?

Accepted Answer

$\mathrm{Si}$

Question 7

Which element is a representative element that is a gas at room temperature and is found in the 2nd Period?

Accepted Answer

$\mathrm{Ne}$

Question 8

Based on Dalton's atomic theory, which statement is NOT consistent with his original postulates?

Accepted Answer

Atoms can be divided into protons, neutrons, and electrons.

Question 9

Which of the following electron configurations violates Hund's Rule?

Accepted Answer

Two electrons paired in one $2p$ orbital before all $2p$ orbitals are singly occupied

Question 10

Which element would have the greatest metallic character based on periodic trends?

Accepted Answer

$\mathrm{Cs}$

Question 11

What is the condensed electron configuration for aluminum ($Z=13$)?

Accepted Answer

$[\mathrm{Ne}]\ 3s^2\ 3p^1$

Question 12

How many valence electrons does a nitrogen atom possess?

Accepted Answer

$5$

Question 13

Which of the following is a transition metal in the 5th Period with similar chemical properties to copper?

Accepted Answer

$\mathrm{Ag}$

Question 14

Which of the following is a possible value for the shell number $n$ of an atom?

Accepted Answer

$n=3$

Question 15

Which electron configuration represents a violation of the Aufbau Principle?

Accepted Answer

An electron configuration where $2p$ orbitals are filled before $2s$ is filled

Question 16

How many unpaired electrons are present in a vanadium atom ($Z=23$)?

Accepted Answer

$3$

Question 17

Which of the following ions is most likely to form from a Group 1A element?

Accepted Answer

$+1$

Question 18

Which element is a nonmetal and exists as a diatomic solid at room temperature?

Accepted Answer

$\mathrm{I}_2$

Question 19

Which of the following best describes the path of an electron within an orbital?

Accepted Answer

Orbital

Question 20

A sample of silver has an atomic mass of $107.868$ amu. The Ag-109 isotope ($108.905$ amu) is $48.16\%$ abundant. What is the mass of the other isotope?

Accepted Answer

$106.905$ amu

Elements, Atoms, and the Periodic Table: General Chemistry Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards