Atoms & The Periodic Table

A vertical column on the periodic table is ___.

• Period

• Group

• Metals

• Ions

A positively charged ion is ___.

• isotope

• anion

• cation

• neutral

atoms of the same element with different numbers of neutrons:

• ions

• isotopes

• cations

• anions

atoms that gain electrons become this:

• anion

• cation

• isotope

• neutral

an atom with an equal number of protons and electrons:

• anion

• cation

• neutral

• isotope

a negatively-charged ion:

• anion

• cation

• neutral

• period

a horizontal row on the periodic table:

• group

• period

• anions

• cations

atoms that lose electrons become this:

• radioactive

• neutral

• cations

• anions

What the earliest scientists and philosophers believed that atoms looked like

• Fuzzy spheres (electron cloud model)

• Planets (electrons) orbiting the sun (nucleus)

• featureless spheres (billiard balls)

JJ Thompson's experiment with a cathode ray tube and magnets discovered what particle in atoms?

• proton

• neutron

• electron

• neurons