Chapter 1 TEST

Which of the following elements requires the most amount of energy to remove an electron from an atom to form an ion?

• He

• H

• O

• K

• Fr

The element in the Periodic Table found in Period 4 and Group 16 is:

• chromium

• sulfur

• selenium

• titanium

The particle that may vary in atoms of the same element:

• proton

• electron

• atom

• neutron

The mass listed in the Periodic Table for each element is:

• the mass of all isotopes of the element combined

• the average of the atomic masses of all of the isotopes of the element

• the average of the number of electrons found in all isotopes of the element

• the exact mass of the protons and neutrons in the most common isotope of the element

• the mass of the average number of neutrons in all of the isotopes of the element

Atoms of elements in a group on the Periodic Table have similar chemical properties. This similarity is most closely related to the atoms'

• number of energy levels

• number of valence electrons

• atomic numbers

• atomic masses

Using your Periodic Table, predict which element has the strongest metallic character.

• Bi

• As

• P

• N

As atoms of elements in Group 16 are considered in order from top to bottom, the electronegativity of each successive element:

• decreases

• increases

• remains the same

Periodic Law states:

• that elements are organized by their isotope number

• that elements are arranged in order of increasing atomic number

• that elements are arranged by increasing reactivity across periods

• that elements decrease in reactivity as you travel down a group

In Thomson's model of the atom, he describes the electrons as:

• orbiting the nucleus in distinct energy levels

• having the greatest mass within the nucleus

• embedded within a positive sphere, similar to plum pudding

• having a positive charge

Which of the following is least reactive?

• Ca

• Mg

• Fr

• Na

• K