Atoms & Elements

The smallest part of any substance is?

• Element

• Compound

• Atom

• Molecule

What is the relationship between elements and atoms? 

• Elements are made of one type of atom and atoms are the smallest part of the element.
• Elements are made of two or more types of atoms and atoms are the smallest part of the element. 

Tags

NGSS.MS-PS1-1

Which of the following best describes an atom?

• protons and neutrons grouped together
• protons and electrons grouped together
• a core (center) of protons and neutrons surrounded by electrons
• a core of electrons and neutrons surrounded by protons

Tags

NGSS.MS-PS1-1

What is at the center of every atom?

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

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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

Which of the following is found farthest from the center of an atom?

• nucleus
• proton
• neutron
• electron

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

The protons in an atom’s nucleus have what kind of charge?

• positive
• negative
• neutral
• no charge

True or False? Neutrons have a negative charge

• True

• False

How many protons does the element in this image contain?

• 14

• 7

• 15

• 18

Tags

NGSS.MS-PS1-1