Atoms, Elements, and Compounds

Which atomic particle is represented by the letter a?

• proton

• neutron

• electron

Tags

NGSS.MS-PS1-1

Which atomic particle is represented by the letter b?

• proton

• neutron

• electron

Tags

NGSS.MS-PS1-1

Which atomic particle is represented by the letter c?

• proton

• neutron

• electron

Tags

NGSS.MS-PS1-1

Which of these is not one of the most common elements in the Earth's oceans?

• oxygen

• chlorine

• hydrogen

• nitrogen

Which of the following substances cannot be broken down by other substances?

• salt

• water

• carbon dioxide

• oxygen

Tags

NGSS.MS-PS1-5

How many different elements are in the compound NaOH?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which of these is not one of the most common elements in Earth's crust?

• oxygen

• lithium

• silicon

• iron

on the periodic table, the number of protons plus the number of neutrons is expressed by the ___.

• electric charge

• nuclear number

• atomic number

• atomic mass

What makes an atom of one element different from one atom of another element?

• each element has a unique atomic mass

• each element has a different number of nuclei

• each element has a different number of neutrons

• each element has a different number of protons

Which of these is the most common element in Earth's atmosphere?

• oxygen

• nitrogen

• hydrogen

• carbon dioxide