TEKS 4.3

An element’s reactivity and other chemical properties are determined by the number of -

• isotopes it has.

• oxidation states.

• valence electrons.

• orbitals in an atom.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following properties uniquely identifies every element?

• Number of valence electrons

• Charge of the atom

• Number of neutrons

• Number of protons

Valence electrons are electrons in the shell

• furthest from the nucleus

• closest to the nucleus

• having the lowest energy level

• that has the fastest electrons

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

• 1

• 2

• 8

• 18

What are valence electrons?

• The total number of electrons in an atom

• The number of electrons in the outermost shell

• The number of electrons in the second shell

• The number of protons in the outermost shell

• 2
• 6
• 10
• 16

Tags

NGSS.MS-PS1-1

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

What is the primary source of energy for the Earth's climate system?

• The Moon

• The Sun

• The Earth's core

• Ocean currents

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

Which of the following is a renewable energy source?

• Coal

• Natural Gas

• Wind

• Nuclear

What is the chemical formula for water?

Tags

NGSS.MS-PS1-1