Chemistry for life pt 2 11.10.22

Chemistry for life Pt 2

Weight, number, ions, valence

​Ions are electrically charged atoms

​

An atom becomes an ion when it loses or gains an electron​

Multiple Choice

How many Mn atoms are found in the following compound?

2MnO₄

• 1

• 2

• 4

• 8

Multiple Choice

What is the little number after an element in a chemical equation called?

Example: H₂

• Coefficient

• Atom

• Subscript

• Equation

Multiple Choice

How many different elements are present in H₂COCH₂

• 5

• 4

• 3

• 2

Multiple Choice

How many Hydrogen atoms are in 4H₂O?

• 6

• 8

• 2

• 4

Multiple Choice

How many atoms are present if there is no subscript following the element symbol?

• 0

• 2

• only 1

• 1 million

Multiple Choice

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical equation

Multiple Choice

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation