Ask a New Question
Menu

1.

(03.02 LC)

The element zinc is represented by the abbreviation
. (Capitalization is important.) (2 points)
2.
(03.02 MC)

Oxygen is more reactive than nitrogen. (2 points)

True

False
3.
(03.02 MC)

Match the element with its description. (4 points)
1.
Krypton
2.
Fluorine
3.
Lithium
4.
Lead
a.
Malleable, soft, and shiny
b.
Opaque solid with higher density
c.
Highly reactive gas
d.
Nonreactive gas
4.
(03.02 MC)

Which of the following elements has the largest atomic radius? (2 points)

Silicon

Aluminum

Sulfur

Phosphorous
5.
(03.02 MC)

Which of the following elements is the most reactive? (2 points)

Beryllium

Calcium

Magnesium

Barium
6.
(03.02 MC)

A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have? (3 points)

13

5

9

4
7.
(03.02 MC)

Use your periodic table of elements. Take any element from the first column, except for hydrogen and lithium, and answer the following questions:

What is the element's name and symbol?
Is it a metal, nonmetal, or metalloid?
Which family does it belong to?
How many protons, neutrons, and electrons does its neutral atom have? (5 points)

1 answer

Sure! Let's go through each question one by one.

  1. The element zinc is represented by the abbreviation:

    • Zn (2 points)

  2. Oxygen is more reactive than nitrogen.

    • True (2 points)

  3. Match the element with its description:

      1. Krypton - d. Nonreactive gas
      1. Fluorine - c. Highly reactive gas
      1. Lithium - a. Malleable, soft, and shiny
      1. Lead - b. Opaque solid with higher density (4 points)

  4. Which of the following elements has the largest atomic radius?

    • Aluminum (2 points) (Atomic radius generally increases down a group and decreases across a period. Aluminum is below silicon and has a larger atomic radius.)

  5. Which of the following elements is the most reactive?

    • Barium (2 points) (Barium is more reactive than the other alkaline earth metals listed.)

  6. A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have?

    • 5 (For beryllium, the atomic number is 4 (which gives it 4 protons and 4 electrons), and the atomic mass is 9. Number of neutrons = Atomic mass - Atomic number = 9 - 4 = 5.)

  7. Use your periodic table of elements. Take any element from the first column, except for hydrogen and lithium, and answer the following questions:

    • Let's take Sodium (Na) as an example:
      • Element's name and symbol: Sodium (Na)
      • It is a: Metal
      • Which family does it belong to? Alkali metals
      • How many protons, neutrons, and electrons does its neutral atom have?
        • Protons: 11
        • Neutrons: 12 (average atomic mass is about 23)
        • Electrons: 11

Feel free to ask if you have more questions or need further assistance!