Multiple Choice
Which of the following elements is a liquid at room temperature?
A) neon
B) helium
C) mercury
D) lithium
Correct Answer:
Verified
Correct Answer:
Verified
Q49: The number of atoms in 1 g
Q50: Assume that the mixture of substances in
Q51: Which element indicated by letter in the
Q52: Which is not true?<br>A)Mendeleev ended each row
Q53: Identify the chemical symbol of element Q
Q55: How many electrons are in the ion,Fe<sup>2+</sup>?<br>A)24<br>B)26<br>C)28<br>D)56
Q56: The chemical formula for rubidium peroxide is<br>A)RbOH.<br>B)RbO<sub>2</sub>.<br>C)Rb<sub>2</sub>O.<br>D)Rb<sub>2</sub>O<sub>2</sub>.
Q57: The chemical formula for calcium telluride is<br>A)Ca(TeO<sub>3</sub>).<br>B)Ca(TeO<sub>2</sub>).<br>C)CaTe.<br>D)CaTe<sub>2</sub>.
Q58: Which of the following represent isotopes? A:
Q59: What is the chemical symbol for manganese?<br>A)Hg<br>B)Mg<br>C)Mn<br>D)Na