Intro to Atoms & Periodic Table

Which ion has a charge of 1-?

• an ion with 9 protons, 10 neutrons, and 10 electrons

• an ion with 11 protons, 12 neutrons, and 10 electrons

• an ion with 7 protons, 7 neutrons, and 8 electrons

• an ion with 12 protons, 12 neutrons, and 12 electrons

A box from the periodic table for the element oxygen (O) is shown below. Use the information in the box to answer any questions that follow. What is the atomic number of oxygen?

• 8

• 16

• 18

• 20

Tags

NGSS.MS-PS1-1

What characteristic is used to differentiate isotopes of the same element?

• A. number of neutrons

• B. number of electrons

• C. atomic number

• D. chemical symbol

Tags

NGSS.HS-PS1-8

What is the atomic number of carbon?

• 4

• 5

• 6

• 7

How many protons are in a neutral carbon atom?

• 5

• 6

• 7

• 8

Which statement is correct about a cation?

• It is created when an atom loses electrons.

• It typically belongs to a nonmetal group.

• It contains more electrons than protons.

• It is formed by gaining protons.

• A. 14

• B. 16

• C. 32

• D. 48

Tags

NGSS.MS-PS1-1

Which of the following particles are located in the nucleus of an atom?

• protons

• neutrons

• electrons

• quarks

• photons

Which picture correctly models an atom from a lithium isotope?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

In the periodic table, elements are grouped based on similar properties. How are elements with the same number of valence electrons organized?

• They are placed in the same group. Elements with the same valence electrons are found in vertical columns.

• They are placed in the same period. Elements with similar valence electrons are found in horizontal rows.

• They are separated into different groups. Elements with different valence electrons are in the same group.

• They are separated into different periods. Elements with the same valence electrons are in different periods.