1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
melamori03 [73]
3 years ago
7

Hydrogen is unique among the elements because __________. 1. It has only one valence electron. 2. It is the only element that ca

n emit an atomic spectrum. 3. Its electron is not at all shielded from its nucleus. 4. It is the lightest element. 5. It is the only element to exist at room temperature as a diatomic gas.
Chemistry
1 answer:
Talja [164]3 years ago
6 0

Answer:

3,4

Explanation:

Hydrogen has no other electron hence there is no screening of the valence electron by inner electrons. It is the lightest known element with a relative molecular mass of 2. Screening effect refers to the fact that inner or core electrons prevent the outermost electron from feeling the attractive force of the nucleus.

You might be interested in
How to keep pipes from freezing during power outage?.
Maurinko [17]

Answer: <em>Running water, even at a trickle, helps prevent pipes from freezing. If you decide to use fuel-burning equipment, such as a kerosene heater, ensure it is vented to outside and kept clear of any vents. Keep garage doors closed if there are water supply lines in the garage.</em>

Explanation:

8 0
2 years ago
Read 2 more answers
What is one use of the fluoride ion?
bearhunter [10]

Answer:

Fluoride is commonly used in dentistry to strengthen enamel, which is the outer layer of your teeth. Fluoride helps to prevent cavities. It’s also added in small amounts to public water supplies in the United States and in many other countries. This process is called water fluoridation.

Explanation:

3 0
2 years ago
Is the answer A, B, C, or D?
Sunny_sXe [5.5K]

Answer:

C

Explanation:

C because there is more in it than the rest of the idems

4 0
3 years ago
Pls help i will mark brainlist
Veseljchak [2.6K]

58.5 moles

can i plz get brainliest

4 0
2 years ago
An unsaturated aqueous solution of NH3 is at 90.°C in 100. grams of water. According to Reference Table G, how many grams of NH3
Illusion [34]
The answer will be 2. 10.g
Hope it's help you
3 0
3 years ago
Other questions:
  • Choose all the answers that apply.
    10·1 answer
  • Rate is related to?<br> A. Volume<br> B. Time<br> C. Distance <br> D. Percentage
    11·2 answers
  • Dependent variable definition
    9·2 answers
  • In which layer does the temperature vary the MOST?
    14·2 answers
  • An atom has the electron arrangement 2,8. What will it do to gain a full
    12·1 answer
  • Complete the reaction
    8·1 answer
  • Please answer both questions Thankyou
    12·1 answer
  • What are the chemicals used to preserve food and give it color and flavor​
    11·1 answer
  • Hi! I produce proteins inside the cell. What am I?​
    13·2 answers
  • Pls help me with this I will give you brain
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!