SMCC_Foundations of ChemistryMidterm_Flashcards

Front

The number, four hundred and twenty thousand, written in scientific notation is best written as

Back

4.20 x 10⁵

Front

How many significant digits can be found in the temperature shown on the thermometer?

Back

3

Front

The number of significant digits in 0.30500 is

Back

5

Front

The result of 3.16 x 8.314 reported to the proper number of significant figures is:

Back

26.3

Front

The isotope represented by ²⁴Mg⁺¹ has how many: Protons, Neutrons, Electrons

Back

12 Protons 12 Neutrons 11 Electrons

Front

Which of the following is a chemical property?

• it has white color
• it burns spontaneously when exposed to air
• It has specific melting point
• It is solid room temperature

Back

it burns spontaneously when exposed to air

Front

Identify the symbols for a metal, a non-metal, and a noble gas in that order. Options: Li, B, F, Mg, Mn, O, Na, S, Ar, F, Cl, Br

Back

Na, S, Ar

Front

Higher energy transition in atoms generally produce?

Back

Higher frequency radiation

Front

Observation 1: melting a block of ice
Observation 2: burning a piece of wood
Observation 3: dissolving sugar in water

Classify each observation as a physical or chemical change, then tally them.

Back

1 chemical change
3 physical changes

Front

Which element is correctly matched with its symbol? Mn, magnesium; Fl, fluorine; K, potassium; Mg, manganese

Back

K, potassium