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
A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely
love history [14]
Heat is energy, and that energy would eventually cause the object to undergo a phase change.
5 0
3 years ago
Read 2 more answers
How can a piece of wood floating on water illustrate the condition of lowest potential energy and maximum
drek231 [11]

Answer:

By minimizing the height of the body's center of gravity relative to its center of buoyancy

Explanation:

In hydrostatics, the equilibrium state of a floating body relates to either a maximum or minimum of the potential energy.An equilibrium is stable when the potential energy is minimum.Minimizing the height of the floating body's center of gravity relative to its center of buoyancy attains a stable equilibrium configuration.

4 0
3 years ago
To find the atomic mass of a particular atom you need to know
AveGali [126]
The answer is (C) as the definitions states that atomic mass is the number of protons and neutrons.
Hope this helps :).
6 0
3 years ago
Balance the equation <br> Ca(s) + H3PO4(aq) ----&gt;Ca3(PO4)2(s) + H2(g)
vovikov84 [41]
Answer: CO2x+O4H I don’t know if this is the right answer
3 0
2 years ago
Name three elements that are named after people.
natali 33 [55]

Answer:

Bohrium (Niels Bohr)

Curium (Marie and Pierre Curie)

Einsteinium (Albert Einstein

4 0
2 years ago
Read 2 more answers
Other questions:
  • Propose a mechanism to account for the formation of a cyclic acetal from 4-hydroxypentanal and one equivalent of methanol. If th
    15·1 answer
  • What is point group of allene?​
    7·2 answers
  • The hydrogen bonding in water creates ________, a cohesive force that enables one to slightly overfill a glass with water or all
    12·1 answer
  • Drag each tile to the correct box.
    14·1 answer
  • How do scientists use sonar to study earth's oceans?
    9·1 answer
  • An object that has 0 acceleration will NEVER be in motio<br> TRUE<br> FALSE<br> Check it
    10·2 answers
  • What is the atomic radius <br> of mercury?
    10·1 answer
  • Which one of these is it?
    11·1 answer
  • Which among the given gases will effuse faster
    12·2 answers
  • How much heat is released if 5.4 g of steam at 105°C is condensed to liquid water
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!