14. Which subatomic particle is the lightest? A. Electron
B. Neutron
C. Proton
D. Proton and neutron
15. Which subatomic particle is the heaviest? A. Electron
B. Neutron
C. Proton
D. Proton and neutron
16. Which of the following statements is true about the mass of protons and electrons?
A. Protons are lighter than electrons
B. Protons are heavier than electrons
C. Protons and electrons have the same mass
D. Proton and electron masses cannot be determined.
17. Which subatomic particles have almost the same mass?
A. Electron only
B. Electron and neutron
C. Electron and proton
D. Neutron and proton
18. What would happen if two similar electrical charges in contact with each other? A. Align
B. Attract
C. Do not interact
D. Repel
19. What would happen if an atom loses a valence electron?
A. The atom will become positively charged because it has lost an electron.
B. The atom will become negatively charged because it has lost an electron,
C. The atom will lose the same number of protons to keep the charge neutral.
B. Neutron
C. Proton
D. Proton and neutron
15. Which subatomic particle is the heaviest? A. Electron
B. Neutron
C. Proton
D. Proton and neutron
16. Which of the following statements is true about the mass of protons and electrons?
A. Protons are lighter than electrons
B. Protons are heavier than electrons
C. Protons and electrons have the same mass
D. Proton and electron masses cannot be determined.
17. Which subatomic particles have almost the same mass?
A. Electron only
B. Electron and neutron
C. Electron and proton
D. Neutron and proton
18. What would happen if two similar electrical charges in contact with each other? A. Align
B. Attract
C. Do not interact
D. Repel
19. What would happen if an atom loses a valence electron?
A. The atom will become positively charged because it has lost an electron.
B. The atom will become negatively charged because it has lost an electron,
C. The atom will lose the same number of protons to keep the charge neutral.
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Answer:
14.b
15.b
16.c
17.d
18.d
19.Answer:When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons. In the opposite case when an atom gains electron(s) it becomes negatively charged (more electrons than protons).