semster 1 exam 24

Front

Do rows on the periodic table run from side to side?

Back

True

Front

Elements in the same vertical group are more similar to each other.

Back

True

Front

Chemical reactivity is based on what subatomic particle?

Back

valence electrons

Front

The identity of an atom can always be determined by the number of ______________ it has.

Back

protons

Front

Electrons are ________ charged and found in the __________.

Back

negatively, electron cloud

Front

Mendeleev arranged his table by increasing atomic ________, but Mosely put it in order by increasing atomic ________.

Back

mass, number

Front

Groups 1 and 17 are the most reactive elements are called______________ &______________ respectively.

Back

alkali metals & halogens

Front

Noble gases are unreactive because

Back

They have a full outer shell

Front

Which of the following is a property of nonmetals? ductility, brittleness, malleability, high luster

Back

brittleness

Front

When electrons are removed, the atoms becomes a positively charged

Back

cation