Chemistry Midterm-Measurement through Reactions-need pt & calc

Front

What is electronegativity?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which element has the greatest electronegativity?

Back

Fluorine (F) has the greatest electronegativity.

Front

What is the charge of the nucleus of an aluminum atom?

Back

The nucleus of an aluminum atom has a charge of +13 due to its 13 protons.

Front

How many electrons surround an aluminum atom?

Back

An aluminum atom is surrounded by a total of 13 electrons.

Front

What type of reaction is CH4 + O2 yields CO2 + H2O?

Back

This is a combustion reaction.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form.

Front

Convert 0.00890 to scientific notation.

Back

0.00890 in scientific notation is 8.90 x 10^-3.

Front

What are precipitates?

Back

Precipitates are solids that form and settle out of a liquid mixture during a chemical reaction.

Front

What is a catalyst?

Back

A catalyst is a substance that increases the rate of a chemical reaction without undergoing any permanent chemical change.

Front

Define isotopes.

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.