Chemistry Atoms

They are the electrons in the outermost shell of an atom

• Valence electrons

• strayed electrons

• balance electrons

What are valence electrons and where are they located in an atom?

• Valence electrons are located in the outermost energy level or shell of an atom.

• Valence electrons are located in the protons of an atom.

• Valence electrons are located in the innermost energy level or shell of an atom.

• Valence electrons are located in the nucleus of an atom.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is represented by the letters found on each box of the Periodic Table?

• Atomic Number

• Density

• Chemical Symbol

• Mass Number

What is represented by the numbers found on each box of the Periodic Table?

• Atomic Number

• Density

• Chemical Symbol

• Mass Number

Which element has the atomic number 1?

• Helium

• Hydrogen

• Oxygen

• Carbon

What is the atomic mass of an element?

• The number of protons in the nucleus

• The number of electrons around the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of protons and electrons in an atom

Which of the following is NOT a chemical element?

• Water

• Gold

• Oxygen

• Nitrogen

Which element is classified as a noble gas?

• Hydrogen

• Oxygen

• Neon

• Carbon

Which of the following elements is a metal?

• Helium

• Chlorine

• Sodium

• Carbon

An atomic number is the number of protons in the nucleus of an atom

• True

• False