Chemistry Unit 2 Practice Test

Which family on the periodic table is generally unreactive?

• Alkali Metals

• Alkaline Earth Metals

• Halogens

• Noble Gases

How many valence electrons do elements in Group 1 have?

• 0

• 1

• 2

• 3

The atomic number tells you the number of ____ and number of ____

• protons; neutrons

• protons; electrons

• neutrons; valence electrons

• valence electrons; energy levels

What happens to the number of electrons as the atomic number on the periodic table increases?

• increases

• decreases

• stays the same

• changes depending on the state of matter

The elements in Group 2 of the Periodic Table are knows as the _______ _____ Family.

• Alkali Metals

• Alkaline Earth Metals

• Transition Metals

• Halogens

Atomic radius _____ as the atomic number increases within a group of elements.

• increases

• decreases

• stays the same

• cannot be determined

Elements in the same ____ have similar chemical properties or reactivity.

• period

• group

• state of matter

• periodic table

Using the Periodic Table, predict which elements will have similar chemical properties or reactivity.

• Be, B, C

• Fe, Co, Ni

• F, Cl, Br

• Si, As, Te

A sample of Element Q is found to contain 51.27% of isotope type 1 (77.227 amu) and 48.73% of isotope type 2 (81.394 amu). Calculate the average atomic mass.

• 79.26

• 79.36

• 158.62

• 7925.76

Group 18 elements are unique in that they all share what common physical property?

• conductivity

• reactivity

• atomic radii

• state at room temperature