atoms elements and compounds

Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen?

• Hydrogen is an element made of two or more kinds of atoms.
• Hydrogen is a compound made of only one kind of atom.
• Hydrogen is a compound made of two or more kinds of atoms.
• Hydrogen is an element made of only one kind of atom.

The element oxygen, represented by the symbol O, is classified as

• a pure substance
• a compound
• a mixture
• a solution

This is the smallest unit of an element.

• atom

• molecule

• compound

• nucleus

Tags

NGSS.MS-PS1-1

Any combination of two or more atoms that are chemically combined is called this.

• molecule

• compound

• element

• pure substance

Tags

NGSS.MS-PS1-1

Glucose (C₆H₁₂O₆) contains atoms of carbon, hydrogen, and oxygen that are chemically bonded together.  What type of matter is glucose?

• Glucose is an element
• Glucose is a compound 
• Glucose is a mixture
• Glucose is a metal

Tags

NGSS.MS-PS1-1

Which part of an atom is POSITIVELY charged?

• protons
• neutrons
• electrons
• atoms

What is at the center of every atom?

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

Tags

NGSS.MS-PS1-1

What part of an atom is NEGATIVELY charged?

• protons
• neutrons
• electrons
• atoms

Which part of an atom has no charge?

• protons
• neutrons
• electrons
• atoms

What is the picture displayed?

• Atom
• Element
• Molecule
• Compound

Tags

NGSS.MS-PS1-1