1.Noble gases don\'t participate in the chemical reactions. T/F 2.Substances wit

ID: 1377362 • Letter: 1

Question

1.Noble gases don't participate in the chemical reactions. T/F

2.Substances with covalent bonding usually have low melting and boiling points. T/F

3.Elements in the second representative group tend to ? when they participate in the ionic bonding.

a.lose one

b.lose two

c.gain one

d. gain two

3.In the ionic bonding the metal element always gains the electron and becomes the negative ion. T/F

4.An element in the fourth period of the periodic table has ____ electron shells.

5.The atomic number of an element is 6. How many electrons do exist in the second electron shell in this element?

1.Noble gases don't participate in the chemical reactions. T/F

True : Noble gases will form only complex campounds but will not participate in any chemical raections

2.Substances with covalent bonding usually have low melting and boiling points. T/F

True: Because They have weak intermolecular forces

3.Elements in the second representative group tend to ? when they participate in the ionic bonding.

a.lose one

b.lose two

c.gain one

d. gain two

Ans: b. loose two electrons (ex: Be2+, Mg2+, Ca2+, Sr2+, Ba2+..)

3.In the ionic bonding the metal element always gains the electron and becomes the negative ion. T/F

Fals: Metal element always loose electron

4.An element in the fourth period of the periodic table has ____ electron shells.

Ans:4s and 3d electron shells

5.The atomic number of an element is 6. How many electrons do exist in the second electron shell in this element?

Ans: 4 electrons (1s22s22p2)

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