Very Short Question and Answers - Atomic Mass
Q 1.
What is the atomic mass unit defined as in relation to carbon-12?
Ans:
One atomic mass unit (u) is defined as 1/12 of the mass of one atom of carbon-12.
Q 2.
Why was oxygen originally used to define atomic mass?
Ans:
Oxygen was used because it reacts with many elements and forms several compounds.
Q 3.
What does it mean when we say the atomic mass of an element is given relative to carbon-12?
Ans:
It means the atomic masses of elements are compared based on the mass of a carbon-12 atom.
Q 4.
Which element has an atomic mass of 24 u?
Ans:
Magnesium has an atomic mass of 24 u.
Q 5.
How do the majority of atoms in elements exist?
Ans:
Most atoms exist as molecules or ions rather than independently.
Q 6.
What is the atomic mass of chlorine according to the table?
Ans:
Chlorine has an atomic mass of 35.5 u.
Q 7.
Which of the following best describes how relative atomic masses are utilized?
Ans:
Relative atomic masses are compared based on carbon-12.
Q 8.
Why can’t atoms be seen with the naked eye?
Ans:
Atoms are too small to be seen with the naked eye.
Q 9.
What happens to atoms when they bond together?
Ans:
When atoms bond together, they form molecules or compounds.
Q 10.
What analogy is used to explain the concept of atomic mass?
Ans:
The analogy of a watermelon divided into pieces is used to explain atomic mass.