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
Vinil7 [7]
3 years ago
7

What does the number below each element's symbol represent?

Chemistry
2 answers:
storchak [24]3 years ago
8 0

The answer to the question is B

marissa [1.9K]3 years ago
4 0

Answer:

B. The average atomic mass.

<em>APEX</em>

You might be interested in
Your brain and spinal cord are joined to the other parts of your body through __________.
Lostsunrise [7]

Answer is A

You never run down adjacent to you spinal cord and bones. That’s where they are the most protected. There are also holes in the pelvis bone for nerves to pass through

5 0
2 years ago
Help plzzzzzzzzzzzzz
tatuchka [14]

Answer:

A: element B

B: element A

C: element B

D: element A

Explanation:

decrease in size leads increase in electronegativity because the smaller the size, the closer the shell is to the nucleus. Also, atomic radius decreases to the right and up on the periodic table. Atomic radius increases to the left and down a period. I hope this helps!

6 0
3 years ago
The radioactive atom R 88 210 a is an alpha emitter. What nucleus does it produce?
olasank [31]

Answer:

X 86 206

Explanation:

Radioactive atoms are nuclei that can under go disintegration to emit either an alpha particle, beta particle or gamma radiation. The process could be spontaneous or stimulated.

When a radioactive atom R 88 210 emits alpha particle, it would produce an element with atomic number 86 and mass number 206 i.e X 86 206. An alpha particle is usually a helium nucleus.

                     R^{210} ⇒ x^{206} + He^{4} + energy

5 0
3 years ago
A sample of flammable liquid is placed into an enclosed cylinder which is then fitted with a movable piston. Initially the cylin
polet [3.4K]

Answer:

12.09 L

Explanation:

Step 1: Convert 826.1 mmHg to atm

We will use the conversion factor 760 mmHg = 1 atm.

826.1 mmHg × 1 atm/760 mmHg = 1.087 atm

Step 2: Convert 427.8 J to L.atm

We will use the conversion factor 101.3 J = 1 L.atm.

427.8 J × 1 L.atm/101.3 J = 4.223 L.atm

Step 3: Calculate the change in the volume

Assuming the work done (w) is 4.223 L.atm against a pressure (P) of 1.087 atm, the change in the volume is:

w = P × ΔV

ΔV = w/P

ΔV = 4.223 L.atm/1.087 atm = 3.885 L

Step 4: Calculate the final volume

V₂ = V₁ + ΔV

V₂ = 8.20 L + 3.885 L = 12.09 L

5 0
2 years ago
What would limit the population growth of rabbits in a forest<br> ecosystem?
mihalych1998 [28]
Other predators? or other factors that affect the food chain ie extinction of whatever source the rabbits feed off of
5 0
3 years ago
Other questions:
  • How is a satellite affected by the earths gravity ?
    11·2 answers
  • Consider the following reaction at 298K.
    9·1 answer
  • Archeologist discovered a silver crown in an ancient tomb and sent it for analysis. You placed the crown in a tub of water and f
    15·1 answer
  • A chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. The concentration
    5·1 answer
  • What is the pH of a solution of KOH with a hydroxide concentration of [OH⁻] = 1.10 x 10⁻⁴
    6·1 answer
  • What does this mean???
    15·1 answer
  • If an object goes through a chemical reaction but does not change in mass that object has
    5·1 answer
  • PLS I WILL GIVE BRAINLY How do the number of violence electrons of the light metals compared to those heavier than boron
    8·1 answer
  • Which is a property of all bases?
    7·1 answer
  • How does the curing basically take place?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!