I'm doing Science right now. I have the answers down for most of them but I'm not sure if I am right..... Can u pls help me and tell me if my answers r right? I suck at science :S
1.A
2.C
3.B
4.D
5.D
6.A
7.?
8.A
9.E
10.C
11.A
12.D
13.C
14.B
15.?
16.?
17.?
18.E
19.D
20.E
1. The positively charged particle in an atom:
A. proton
B. neutron
C. electron
D. pion
E. gluon
2. The negatively charged particle in an atom:
A. proton
B. neutron
C. electron
D. pion
E. gluon
3. The largest particle in an atom:
A. proton
B. neutron
C. electron
D. pion
E. gluon
4. Tiny particles that can be exchanged by protons and neutrons:
A. alpha particles
B. quarks
C. electrons
D. pions
E. gluons
5. Tiny particles that can be emitted by neutrons to form protons:
A. alpha particles
B. quarks
C. gluons
D. beta particles
E. photons
6. An isotope remains unchanged by the emission of a gamma ray, which is a(an) __________.
A. alpha particle
B. quark
C. gluon
D. beta particle
E. photon
7. An unstable isotope is transformed into a different element by the emission of a(n)__________.
A. alpha particle
B. quark
C. gluon
D. gamma ray
E. photon
8. A hydrogen atom with no electron is the same as a __________.
A. proton
B. neutron
C. photon
D. pion
E. beta particle
9. A helium-4 atom with no electrons is the same as a(an) __________.
A. proton
B. neutron
C. photon
D. pion
E. alpha particle
10. A gamma ray is pure __________.
A. magnetism
B. mass
C. energy
D. all of the above
E. none of the above
11. Niels Bohr is known for his model of the:
A. atom
B. atomic nucleus
C. simple electron orbit
D. all of the above
E. none of the above
12. The very complex __________ corrects the oversimplifications of the Bohr model.
A. Rutherford model
B. relativity model
C. Newtonian model
D. quantum-mechanical model
E. none of the above
13. The errors of the Bohr model center around the treatment of the:
A. protons
B. neutrons
C. electrons
D. quarks
E. none of the above
14. The number of protons in the nucleus of an atom:
A. atomic mass
B. atomic number
C. isotope number
D. half-life number
E. none of the above
15. The total number of protons and neutrons in the nucleus of an atom:
A. mass number
B. atomic number
C. isotope number
D. half-life number
E. none of the above
16. Radioactive decay occurs as __________.
A. alpha decay
B. beta decay
C. gamma decay
D. all of the above
E. none of the above
17. Radioactive decay occurs in an atom that has a(n) __________.
A. unstable nucleus
B. unstable electron shell
C. excess of electrons
D. deficit of electrons
E. none of the above
18. The rate of radioactive decay is measured in terms of __________.
A. isotopes
B. grams
C. rads
D. roentgens
E. half-life
19. Assuming that the half-life of a radioactive substance is 10 years, how much of the original substance will remain after 20 years?
A.100%
B. 75%
C. 50%
D. 25%
E. zero
20. Radioactive dating using ^14C (carbon isotope 14) has been shown to be inaccurate due to differences in ^14C found in __________.
A. dinosaur bones
B. rock strata
C. igneous rock
D. sedimentary rock
E. none of the above
3 answers
7) helium nucleus
11) electrons
15) total mass
16) more than one
17) instability
2 correct
3 correct
4 correct
5 correct
There's the first 5.... I'll check the others when i get some sleep....
I don't understand your answers. None of the ones you gave me match the multiple choice answers. Are you giving me wrong answers on purpose or.....?
@Osprey
Oh, okay..... Yeah, lol. I should get some too.