paper.
7. Which of the following sub-atomic particle is negatively charged?
A. electron B. neutron C. plasma D. proton
2. What is known as positively charged particle?
A electron B. neutron C. plasma D. proton
3. Which of the following describes a neutral atom? The
4. atom (6 uncharged
B. positive and negative changes of an atom balance each other
c. number of electrons in an atom is the same as the number of protons
D. all of these
4. What happens to an atom when it gains or lose electrons? it becomes
D. neutron
A. compound B. ion
C. isotope
5. What happens to an atom when it becomes an ion?
A will no longer be neutral
B. gains slectron and becomes a negative ion
C. loses electrons and becomes a positive ion
D. of these
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