RC Fall Final Review

Front

What is the result of 4.627 / 0.00371 rounded to the correct number of significant figures?

Back

1250

Front

If an element has 3 valence electrons, what charge will likely form on its ion?

Back

+3

Front

What is the name of the ionic compound Cr(NO2)3?

Back

chromium III nitrite

Front

How do you convert 2.4 x 10^21 formula units of magnesium hydroxide (Mg(OH)2) to grams?

Back

0.23 g Mg(OH)2

Front

What is the correct Lewis Dot Structure for ammonia (NH3)?

Back

[H] | [H]-[N]-[H] (with a lone pair on N)

Front

Define significant figures in mathematics.

Back

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

Front

What is a valence electron?

Back

A valence electron is an electron in the outermost shell of an atom that can participate in chemical bonding.

Front

What is an ionic compound?

Back

An ionic compound is formed when atoms transfer electrons, resulting in positive and negative ions.

Front

How do you determine the charge of an ion from valence electrons?

Back

The charge is determined by the number of valence electrons lost or gained to achieve a full outer shell.

Front

What is the formula for magnesium hydroxide?

Back

Mg(OH)2