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Use the Periodic Table to complete the questions:

How many valence electrons do an atom of silicon (Si) and an atom of Hydrogen (H) have?

Periodic table

(1 point)
Responses

1:4
1:4

4:1
4:1

2:7
2:7

6:1
6:1
Question 2
Silane is a molecule made up of Silicon (Si) and Hydrogen (H).

Use the periodic table, and your knowledge of valence electrons, to determine the chemical formula for this substance.

(1 point)
Responses

SiH
SiH

Si2
H4
Si2H4

H2
SO4
H2SO4

SiH4
SiH4
Question 3
What type of bonds are formed between silicon (Si) and hydrogen (H)?(1 point)
Responses

Covalent
Covalent

nuclear
nuclear

Polar
Polar

Ionic
Ionic
Question 4
Table of electronegativities of the elements.

Looking at the electronegativities of silicon and hydrogen, what can you determine about their electronegativities?

(1 point)
Responses

Silicon has twice the electronegativity of hydrogen.
Silicon has twice the electronegativity of hydrogen.

Silicon has half the electronegativity of hydrogen.
Silicon has half the electronegativity of hydrogen.

The values of their electronegativities are extremely far apart.
The values of their electronegativities are extremely far apart.

The values of their electronegativities are similar.

1 answer

Let's go through each question one by one:

Question 1: How many valence electrons do an atom of silicon (Si) and an atom of hydrogen (H) have?

  • Silicon (Si) has 4 valence electrons.
  • Hydrogen (H) has 1 valence electron.

So the correct response is: 4:1

Question 2: Silane is a molecule made up of Silicon (Si) and Hydrogen (H). Use the periodic table, and your knowledge of valence electrons, to determine the chemical formula for this substance.

Silane consists of one silicon atom and four hydrogen atoms. Thus, the chemical formula for silane is: SiH4

Question 3: What type of bonds are formed between silicon (Si) and hydrogen (H)?

The bond between silicon and hydrogen is a covalent bond. Therefore, the correct response is: Covalent

Question 4: Looking at the electronegativities of silicon and hydrogen, what can you determine about their electronegativities?

While specific electronegativity values can vary slightly depending on the source, typically, silicon has an electronegativity of around 1.90, while hydrogen is about 2.20. This indicates that their electronegativities are relatively close, leading to the conclusion: The values of their electronegativities are similar.

Overall responses:

  1. 4:1
  2. SiH4
  3. Covalent
  4. The values of their electronegativities are similar.