D. an opposite charge and the same mass
82. Which of the following atom consists of exactly fifteen protons?
A. P-32
B. S-32
C. O-15
D. N-15
83. Which of the following three groups represent the most elements classified as metalloids in the periodic table?
A. 1, 2 & 3
B. 2, 13 & 14
C. 14, 15 & 16
D. 16, 17 & 18
84. When a metallic atom combines with a non-metallic atom, the non-metallic atom will...
A. lose electrons and its size will decrease
B. lose electrons and its size will increase
C. gain electrons and its size will decrease
D. gain electrons and its size will increase
85. Which of the following is a binary compound?
A. Hydrogen sulphide
B. Hydrogen sulphite
C. Ammonium sulphide
D. Ammonium sulphate
86. Some students are asked to describe differences between gases and liquids. Three of their suggestions are:
I) Gas molecules are further apart
II) Gas molecules are smaller
III) Liquid molecules vibrate around fixed positions
Which suggestions are correct?
A. II only
B. II only
C. III only
D. All of the above
Answer (2)
The answers are: 1) A. P-32, 2) B. 2, 13 & 14, 3) D. gain electrons and its size will increase, 4) A. Hydrogen sulphide, and 5) D. All of the above.
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The answers to the questions include identifying phosphorus as the element with fifteen protons, recognizing groups 2, 13, and 14 for metalloids, understanding that non-metals gain electrons and increase in size when combining with metals, and recognizing hydrogen sulphide as a binary compound. Additionally, all statements regarding the differences between gases and liquids are correct. ;
