Chemistry - Mock Test 3

Question 21

Where are electrons likely to be found

A) in the nucleus B) in electron clouds C) mixed throughout an atom D) in definite paths

---

No Details

Question 22

A horizontal row on the periodic table is called a(n)

A) group B) family C) period D) atomic number

---

No Details

Question 23

Transition metals are

A) good conductors of thermal energy. B) more reactive than alkali metals. C) not good conductors of electric current. D) used to make aluminum.

---

No Details

Question 24

What is the meaning of the word atom

A) dividable B) invisible C) hard particles D) not able to be divided

---

No Details

Question 25

The carbon group has two metalloids, both of which are used to make

A) dinnerware. B) foil. C) cans. D) computer chips.

---

No Details

Question 26

How would you describe the nucleus

A) dense, positively charged B) mostly empty space, positively charged C) tiny, negatively charged D) dense, negatively charged

---

No Details

Question 27

The number at the top is the

A) atomic number. B) element name. C) atomic mass. D) chemical symbol.

---

No Details

Question 28

The properties of elements in a horizontal row of the periodic table follow

A) a nonrepeating pattern. B) a periodic pattern. C) no pattern. D) an unpredictable pattern.

---

No Details

Question 29

If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-238 have

A) 92 B) 95 C) 143 D) 146

---

No Details

Question 30

A carbon atom with 6 protons, 6 electrons, and 6 neutrons would have a mass number of

A) 6 B) 18 C) 12 D) 15

---

No Details