Chemistry Review 11-21-19

Evaporating, dissolving, & melting are all examples of

• elements

• compounds

• physical changes

• chemical reactions

Which of the following is not evidence of chemical change?

• gas production

• temperature change

• dissolving

• color change

Tags

NGSS.MS-PS1-2

This symbol indicates a _______.

• neutron

• proton

• electron

Tags

NGSS.MS-PS1-1

What information does a subscript number tell us?

• the number of atoms per element

• the number of molecules per formula

Tags

NGSS.MS-PS1-1

What is the atomic mass for this element?

• 6

• 12.0107

• 6.0107

• 18.0107

Tags

NGSS.MS-PS1-1

How many neutrons are in an Calcium atom?

• 20

• 40.08

• 60

Tags

NGSS.MS-PS1-1

The atomic number of an element is determined by the _________ of ________ in the nucleus.

• protons, neutrons

• number, electrons

• electrons, protons

• number, protons

Which image shows a Bohr model for Carbon.

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

If the protons and electrons do not match, the atom is ____.

• neutral

• ion

Tags

NGSS.HS-PS1-7

What is the symbol for an alpha particle?

• ⁴₂He
• ⁰_-1e
• ⁰₊₁ e
• ¹₀n

Tags

NGSS.HS-PS1-8