1:The atomic number is: a)Another name for the mass number of an atom b)Number o

Question

1:The atomic number is:

a)Another name for the mass number of an atom

b)Number of protons in a nucleus

c)Number of neutrons in a nucleus

d)Total number of protons and neutrons in a nucleus

e) number of electrons

2:The chemical properties of the elements are mainly determined by the

a)
Number of protons
b)
Number and distribution of the outer electrons
c)
Number and distribution of the inner electrons

d)Number and distribution of the neutrons

e)All of the above

3: 240 g of a radoactive isotope with a half-life of 10 hours were left on a table. How much of the material remains after a day?


a)120 g
b)
60 g
c)
Some amount between 30 g and 60 g
d)
30 g
e)
24 g
4:Which of these reactors use ordinary water as the moderator and a coolant

a)
High-temperature gas-cooled reactors

b)Light water reactors
c)
Heavy water reactors
d)
Fast breeder reactors
e)
Pebble bed reactors
5:How long would it take for the strength of a10,000-curie iodine-131 (with half-life of 8.04days) source to drop to one millionth of its initial strength?

a)
Around 5-6 months
b)
Around 5-6 years
c)
About 1,250 years
d)
About 2,200 years

e)About 10,000 years

Explanation / Answer

1) b 2) e 3) e 4) b 5) a

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.