Chemistry Semester 2 Day 1

Choose the covalent bonds

• H2O

• KBr

• CaS

• N2

• NH3

Tags

NGSS.MS-PS1-1

J.J. Thomson

• discovered the existence of atoms

• suggested that the entire atom had a (+) charge

• proposed that the atom was a sphere of (-) charge

• concluded that atoms contained mobile particles with a (-) charge

Which radioactive emission is a product of this decay?

• alpha

• beta

• positron

• gamma

Tags

NGSS.HS-PS1-8

What is the mass of 5.00 moles of K2SO4

• 34.8 grams

• 174 grams

• 870 grams

• 675 grams

Based on the information in the table, which mineral is also an element?

• grraphite

• quartz

• calcite

• hematite

Tags

NGSS.MS-PS1-1

If 100 grams of vinegar and 5 grams of baking soda are poured in a container, a small amount of gas will be produced. What will the final mass of the products be if the gas is trapped in the container?

• 100 grams

• 104 grams

• 105 grams

• 110 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The position of an element on the periodic table helps scientists predict the number of electrons an atom will gain or lose during ion formation. According to the Periodic Table of the Elements, which element is MOST likely to gain two electrons when it forms an ion?

• calcium (Ca)

• mercury (Hg)

• oxygen (O)

• iodine (I)

Which of the following is an example of a compound?

• copper

• water

• iron

• carbon

Tags

NGSS.MS-PS1-1

If 2 atoms of the same type are bonded together in a molecule, it is considered a

• monoatomic element

• diatomic element

• compound

• mixture

Tags

NGSS.MS-PS1-1

What amount (in moles) is present in 2.0 g of sodium hydroxide, NaOH?

• 0.050

• 0.10

• 20

• 80