Periodic Properties

In a periodic table, a set of properties repeats from

• element to element

• group to group

• column to column

• row to row

Which subatomic particle has a negative charge?

• electron

• proton

• neutron

• alpha particle

Which statement about subatomic particles is true?

• Protons, neutrons, and electrons all have about the same mass.

• Unlike protons or neutrons, electrons have no mass.

• Neutrons have no charge and no mass.

• An electron has far less mass than either a proton or neutron.

Which of the following is unique for any given element?

• the number of neutrons

• the charge on the electrons

• then number of protons

• the mass of a neutron

The number of protons in one atom of an element is that element’s

• mass number.

• balanced charge

• atomic number

• isotope

To find the number of neutrons in an atom, you would subtract

• mass number from atomic number

• atomic number from mass number

• atomic number from electron number

• isotope number from atomic number

Suppose an atom has a mass number of 23. Which statement is true beyond any doubt?

• The atom has an odd number of neutrons

• the atomic number is less than 11

• the atom is not an isotope

• the number of protons in the nucleus does not equal the number of neutrons.

Which statement is true about oxygen-16 and oxygen-18 ?

• They do not have the same number of protons

• their atoms have identical mass

• they are isotopes of oxygen

• they have the same mass number

Which statement accurately represents the arrangement of electrons in Bohr’s atomic model?

• Electrons vibrate in fixed locations around the nucleus.

• Electrons travel around the nucleus in fixed energy levels with energies that vary from level to level.

• Electrons travel around the nucleus in fixed energy levels with equal amounts of energy.

• Electrons travel randomly in the relatively large space outside the nucleus.

Which statement is true concerning the periodic table?

• rows go up and down and groups go across the table

• groups go up and down and rows go across the table

• rows go up and down and groups go up and down the table

• rows go across the table and groups go across the table