physical science quiz

An element is located in Group 17 (VIIA) and Period 3 on the periodic

table. How can it become chemically stable?

• by gaining 7 electrons

• by gaining 1 electron

• by losing 3 electrons

• by losing 2 electrons

Which element has a +2 oxidation number when it is in the form of an ion?

• barium (Ba)

• fluorine (F)

• hydrogen (H)

• sulfur (S)

How many electrons does a neutral atom of nitrogen (N) need to gain in order to become stable?

• A. 1

• B. 3

• C. 4

• D. 7

An element is located in Group 2 (II) and Period 3 on the periodic table. What is its oxidation number?

• A. –2

• B. +2

• C. –3

• D. +3

An atom has 3 valence electrons. An atom of which element has this

characteristic?

• A. lithium (Li)

• B. sodium (Na)

• C. aluminum (Al)

• D. scandium (Sc)

How many valence electrons are found in an alkaline earth metal?

• A. 1

• B. 2

• C. 3

• D. 4

Which characteristic is the same for the elements in group 1 (IA)?

• A. atomic mass

• B. atomic number

• C. number of protons

• D. number of valence electrons

Which element would most likely lose two electrons in a chemical

reaction?

• A. strontium (Sr)

• B. sodium (Na)

• C. silicon (Si)

• D. sulfur (S)

Which explains the charge of an ion of calcium (Ca)?

• A. 2 electrons are gained by the atom.

• B. 2 electrons are removed from the atom.

• C. 2 protons are removed from the atom.

• D. 2 protons are gained by the atom.

What is the oxidation number for sulfur (S) when bonded to beryllium

(Be)?

• A. +3

• B. +1

• C. 0

• D. -2