Atoms and the Periodic Table

What is an atomic number?

• The number of protons in an element
• The number of neutrons in an element
• The number of protons and neutrons.
• The number of protons and electrons.

Tags

NGSS.MS-PS1-1

What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?

• 12
• 13
• 25
• 24

Tags

NGSS.MS-PS1-1

Changing the number of electrons in an atom results in the formation of :

• positive ion only
• positive  ion or negative ion
• negative ion only
• new atom

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

When there are the same number of protons and electrons in an atom, that atom is a...

• positive ion.
• negative ion.
• unstable isotope.
• neutral atom.

Tags

NGSS.MS-PS1-1

An element can be defined by the number of ___________ in the nucleus of its atoms.

• protons
• neutrons
• electrons
• atoms

Electrons are located outside the nucleus of an atom.

• True
• False

Tags

NGSS.MS-PS1-1

What is the atomic number of an element with 12 protons, 13 neutrons and 12 electrons?

• 12
• 13
• 25
• 24

Tags

NGSS.MS-PS1-1

Changing the number of neutrons in an atom results in the formation of a(an) _______

• atom
• isotope
• anion ( a negative ion)
• cation (a positive ion)

Tags

NGSS.MS-PS1-1

How many protons are in an atom of carbon?

• 12.01
• 8
• 6
• 14

Tags

NGSS.MS-PS1-1

How many electrons does a neutral carbon atom have?

• 0
• 2
• 14
• 6

Tags

NGSS.MS-PS1-1