EOY Practice

Who discovered that atoms are mostly empty space?

• Ernest Rutherford

• Isaac Newton

• Demetri Mendeleev

• Democritus

What was Mendeleev able to predict about elements by ordering the period table by atomic mass?

• Properties

• Atomic Number

• Number of Protons

• Charge of Atoms

Which group number has seven valence electrons?

How many protons, neutrons and electrons does carbon-14 have?

• 12 protons

  12 neutrons

  12 electrons

• 14 protons

  14 neutrons

  14 electrons

• 12 protons

  14 neutrons

  12 electrons

• 14 protons

  12 neutrons

  14 electrons

How many valence electrons does Phosphorus (#15) have?

• 3

• 4

• 5

• 15

What is the charge of an atom with 2 protons, 2 neutrons, and 1 electron?

• +1

• 0

• -1

• -2

If an ion has a charge of +1, is it more likely a metal or nonmetal?

• metal

• nonmetal

• neither

• not enough information

Which element has the lowest electronegativity?

• Hydrogen

• Fluorine

• Astatine

• Francium

Which atom has the smallest atomic radius?

• Hydrogen

• Helium

• Francium

• Fluorine

Which periodic family reacts with alkali metals to form salts?

• Alkaline Earth Metals

• Transition Metals

• Halogens

• Noble Gases