Atoms, Elements, Compounds

What is at the center of every atom?

• An electron
• A compound
• A nucleus
• A molecule

Tags

NGSS.MS-PS1-1

Which two particles make up the nucleus of an atom?

• protons and electrons
• protons and neutrons
• molecules and compounds
• neutrons and electrons

In an atom, what is the number of protons equal to?

• The number of electrons
• The number of molecules
• The number of neutrons
• The number of nucleii

What determines the type of element an atom makes?

• The size of the nucleus
• The number of protons
• How much an atom weighs
• The number of neutrons

What forms when two atoms combine? 

• A nucleus
• A proton
• A molecule
• A neutron

Tags

NGSS.MS-PS1-1

Which of the following cannot be broken down into something simpler?

• A compound
• An element
• A mixture
• A chemical formula

Tags

NGSS.MS-PS1-5

Which of these is most like a recipe? 

• An element
• A periodic table
• An electron formula
• A chemical formula

What needs to occur in order for elements to form a compound?

• An elemental reaction
• An atomic reaction
• An electric reaction
• A chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The air we breathe contains different individual gases (mostly nitrogen and oxygen). Which of the following correctly describes the air we breathe?

• compound
• liquid
• element
• mixture

This picture represents which of the following?

• Element

• Compound

• Molecule

Tags

NGSS.MS-PS1-1