Chem I Hon Semester 1 Exam Review-SY25

Front

How many VALENCE electrons are in 1s² 2s² 2p⁶ 3s² 3p⁵?

Back

7

Front

1000 m = ___________ km

Back

1

Front

Determine the number of Significant Figures in 10.0 grams

Back

3

Front

If a glass of water warms to 78 degrees Celsius, what is its temperature in Kelvin? (Kelvin = C + 273)

Back

351

Front

A tire is inflated with air. Is this a Chemical Change or a Physical Change?

Back

Physical Change

Front

What is the definition of Valence Electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the formula to convert Celsius to Kelvin?

Back

K = C + 273

Front

What are Significant Figures?

Back

Significant figures are the digits in a number that contribute to its precision.

Front

What is the definition of a Physical Change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is the definition of a Chemical Change?

Back

A chemical change is a change that results in the formation of new chemical substances.