Atom Ion Isotope Review

Why are atoms electrically neutral?

• The neutrons balance out any charge.

• There are more neutrons than protons or electrons.

• Protons and electrons are equal, thus cancel each other out because they have opposite charges.

• Neutrons have no charge which makes the who atom neutral.

Two atoms that have different numbers of protons are 

• Different ions

• Different isotopes

• Different elements

Which of the following describes a cation?

• 10 protons, 12 electrons

• 12 protons, 10 electrons

• 12 protons, 12 electrons

• 10 protons, 10 electrons

Which of the following describes an anion?

• 8 protons, 8 neutrons, 8 electrons

• 8 protons, 8 neutrons, 10 electrons

• 8 protons, 10 neutrons, 8 electrons

• 8 protons, 8 neutrons, 6 electrons

Aluminum has an atomic number of 13 and has 3 valence electrons. If a neutral aluminum atom becomes an ion, how many electrons are there in the cation aluminum?

• 10

• 13

• 16

• 3

Chlorine has an atomic number of 17 and has 7 valence electrons. If a neutral chlorine atom becomes an ion, how many electrons are there in the anion chloride?

• 18

• 16

• 17

• 1

Tags

NGSS.MS-PS1-1

A sulfur ion has a 2- charge. How many protons and electrons does this sulfur ion have?

• 16 protons, 16 electrons

• 16 protons, 14 electrons

• 14 protons, 16 electrons

• 16 protons, 18 electrons

A strontium ion has a 2+ charge. How many protons and electrons does this strontium ion have?

• 36 protons, 38 electrons

• 38 protons, 40 electrons

• 38 protons, 36 electrons

• 38 protons, 38 electrons

If the number of neutrons in an atom changes you make a(n) __________________.

• ion

• isotope

• new element

• isomer

If the number of electrons in an atom changes you make a(n) __________________.

• ion

• isotope

• new element

• isomer