Free Printable Se

1.

List the steps of the scientific method

a)

Conduct experiment

b)

Form a hypothesis

c)

Draw conclusions

d)

Communicate results

e)

Ask a question

f)

Analyze results

1

2

3

4

5

6

1)

2)

3)

4)

5)

6)

2.

What is the atomic number of Selenium (Se)?

a)

32

b)

34

c)

36

d)

38

3.

Which of the following is the correct electron configuration for Selenium (Se)?

a)

$[Ar] 3d^{10} 4s^2 4p^4$

b)

$[Ar] 3d^{10} 4s^2 4p^6$

c)

$[Ar] 3d^{10} 4s^2 4p^2$

d)

$[Ar] 3d^{10} 4s^2 4p^3$

4.

Selenium (Se) is classified as which type of element?

a)

Metal

b)

Non-metal

c)

Metalloid

d)

Noble gas

5.

Which of the following compounds contains Selenium (Se)?

a)

$\text{H}_2\text{O}$

b)

$\text{NaCl}$

c)

$\text{SeO}_2$

d)

$\text{CO}_2$

6.

What is the most common oxidation state of Selenium (Se) in compounds?

a)

-2

b)

+2

c)

+4

d)

+6

7.

Selenium (Se) is often used in which of the following applications?

a)

Solar cells

b)

Batteries

c)

Fertilizers

d)

Explosives

8.

Which of the following is a property of Selenium (Se)?

a)

It is a good conductor of electricity

b)

It is a poor conductor of electricity

c)

It is a liquid at room temperature

d)

It is a noble gas

9.

Selenium (Se) is essential for which of the following biological functions?

a)

Vision

b)

Bone health

c)

Thyroid function

d)

Blood clotting

10.

Which of the following statements about Selenium (Se) is true?

a)

It is a transition metal

b)

It is a halogen

c)

It is a chalcogen

d)

It is a noble gas

11.

What is the molar mass of Selenium (Se)?

a)

78.96 g/mol

b)

32.06 g/mol

c)

55.85 g/mol

d)

65.38 g/mol

12.

Which of the following isotopes of Selenium (Se) is stable?

a)

$^{74}\text{Se}$

b)

$^{75}\text{Se}$

c)

$^{76}\text{Se}$

d)

$^{77}\text{Se}$

13.

Selenium (Se) can form a compound with hydrogen. What is the name of this compound?

a)

Selenium hydride

b)

Hydrogen selenide

c)

Selenic acid

d)

Selenous acid

14.

Which of the following is a common use of Selenium (Se) in technology?

a)

Semiconductors

b)

Superconductors

c)

Insulators

d)

Conductors

15.

What is the electron affinity of Selenium (Se)?

a)

200 kJ/mol

b)

195 kJ/mol

c)

207 kJ/mol

d)

190 kJ/mol

16.

Selenium (Se) is most similar in chemical properties to which of the following elements?

a)

Sulfur (S)

b)

Chlorine (Cl)

c)

Argon (Ar)

d)

Iron (Fe)

17.

Which of the following is a health effect of Selenium (Se) deficiency?

a)

Keshan disease

b)

Scurvy

c)

Rickets

d)

Anemia

18.

What is the boiling point of Selenium (Se)?

a)

685 °C

b)

685 °F

c)

685 K

d)

685 °R

19.

Selenium (Se) is often used in the glass industry for what purpose?

a)

To decolorize glass

b)

To strengthen glass

c)

To make glass opaque

d)

To make glass transparent

20.

Which of the following is a natural source of Selenium (Se)?

a)

Fish

b)

Bananas

c)

Rice

d)

Potatoes

21.

What is the crystal structure of Selenium (Se)?

a)

Hexagonal

b)

Cubic

c)

Tetragonal

d)

Orthorhombic

22.

Selenium (Se) is used in photocopiers for what reason?

a)

Its photoconductive properties

b)

Its magnetic properties

c)

Its thermal properties

d)

Its reflective properties

23.

Which of the following is a chemical reaction involving Selenium (Se)?

a)

@@ ext{Se} + ext{O}_2 ightarrow ext{SeO}_2@@

b)

@@ ext{Se} + ext{H}_2 ightarrow ext{SeH}_2@@

c)

@@ ext{Se} + ext{Cl}_2 ightarrow ext{SeCl}_2@@

d)

@@ ext{Se} + ext{N}_2 ightarrow ext{SeN}_2@@

24.

What is the role of Selenium (Se) in antioxidant enzymes?

a)

It acts as a cofactor

b)

It acts as a substrate

c)

It acts as an inhibitor

d)

It acts as a product

25.

Which of the following is a method to detect Selenium (Se) in a sample?

a)

Atomic absorption spectroscopy

b)

Mass spectrometry

c)

Nuclear magnetic resonance

d)

Infrared spectroscopy

Se

Total questions: 25

Worksheet time: 25mins

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