CHEM 107 Exam 1 (Yu Wang)

which of the following is an example of a physical property

lead becomes a liquid when heated to 601 degrees C; ice floats on top of liquid water

which of the following is a chemical change

burning a piece of coal; a freshly cut apple turns brown

the elements in a column of the periodic table are known as

a group

an anion is defined as

a charged atom or group of atoms with a net negative charge

atoms of the same element with different mass numbers are called

isotopes

What is an α particle?

4
2He nucleus

An atom of bromine has a mass about four times greater than that of an
atom of neon. Which choice makes the correct comparison of the relative numbers of
bromine and neon atoms in 1,000 g of each element

There are four times as many neon atoms as bromine atoms

The elements in a horizontal row of the periodic table are known as

a period

What is an β particle

electron