The Structure of Atoms and Elemental Symbols

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

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NGSS.MS-PS2-3

Most of the mass in an atom is made up of _____________________?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• electrons and quarks

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NGSS.HS-PS1-7

Water is an element

• true
• false

DIFFERENT kinds of atoms chemically combined to form a substance are

• Mixture
• Element
• Compound
• Substance

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NGSS.MS-PS1-1

Which subatomic particle determines the identity of an element?

• protons

• neutrons

• electrons

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

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NGSS.MS-PS1-1

What is the mass number of this atom?

• 1

• 3

• 4

• 7

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NGSS.MS-PS1-1

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20

• 10

• 35

• 25

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NGSS.MS-PS1-1

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

Na is the symbol for ____.

• helium
• sulfur
• neon
• sodium