Midterm

An electron is

• positively charged

• neutral

• negatively charged

Tags

NGSS.MS-PS2-3

atomic number is

• the number of protons

• the number of electrons

• the number of neutrons

• the location of an atom on the periodic table

Atomic Mass is the number of

• protons and neutrons in the nucleus of an atom

• protons and electrons in the nucleus of an atom

• neutrons and electrons in the nucleus of an atom

Tags

NGSS.MS-PS1-1

Conservation of mass means

• all the atoms present before a chemical reaction are not present after

• atoms present before chemical reactions are present after

• new substances and new elements are formed in a chemical reaction

Tags

NGSS.MS-PS1-5

Which is not an SI base unit?

• kilogram

• meter

• second

• celsius

the amount of matter in an object

• mass

• weight

• volume

• gravity

How many significant figures are in 4009.30

• 3

• 4

• 5

• 6

Which of the following is not a physical property

• solid at room temperature

• white in color

• high melting point

• breaks down into carbon and water when heated

Elements in the same column have the same number of

• protons

• neutrons

• electrons

How many electrons does carbon -14 have?

• 14

• 6

• 8

• 7