Chemistry Quiz 56 (20 MCQs)

Quiz Instructions

Select an option to see the correct answer instantly.

1. A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

Correct Answer: D) Nucleus.

2. A(n) ..... is a charged particle that forms when an atom gains or loses electrons

Correct Answer: B) Ion.

3. Si + S8 $\rightarrow$ Si2S4

Correct Answer: A) Synthesis (combination).

4. Atoms that gain & lose electrons are called .....

Correct Answer: A) Ions.

5. How many electrons are in the outer shell of sodium

Correct Answer: A) 01.

6. CCl4 has a higher boiling point than HCl. This is due to ..... in CCl4.

Correct Answer: D) Strong London dispersion forces.

7. ..... are the COLUMNS on the periodic table and are organized by similar properties.

Correct Answer: B) Groups.

8. What is the atomic mass for Arsenic?

Correct Answer: A) 75.

9. In dehydration synthesis

Correct Answer: B) Water is removed to form bonds between monomers.

10. A ..... mixture is one that does not have a uniform composition

Correct Answer: A) Heterogeneous.

11. Which of the following is NOT a common sign that a chemical change has take place?

Correct Answer: B) Change in state.

12. A charged atom

Correct Answer: A) Ion.

13. A ..... is a negatively charged particle

Correct Answer: C) Electron.

14. What combination would dissolve a solid solute the fastest?

Correct Answer: D) High temperature, stirring.

15. Increase in temperature causes the particles to

Correct Answer: B) Move faster.

16. A lithium ion is much less reactive than a lithium atom because

Correct Answer: B) Has a full outermost energy level.

17. Isotopes

Correct Answer: C) Can decay to another element if radioactive.

18. Which two particles are found in the nucleus of an atom?

Correct Answer: A) Protons & neutrons.

19. Expressed in scientific notation, 0.0930 m is

Correct Answer: C) 9.30 X 10-2 m.

20. Which is more acidic?

Correct Answer: A) PH of 1.