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
Elina [12.6K]
2 years ago
8

2a Define Radioactivity?​

Chemistry
2 answers:
Luda [366]2 years ago
8 0

Answer:

The emmision of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei

or

the giving off of rays of energy or particles by the breaking apart of atoms of certain elements

Gwar [14]2 years ago
7 0
Jekskowkqoanwknwkwnwownsksnsk
You might be interested in
Complete each sentence using the drop-down menus.
kirill115 [55]

Answer:

Desertification mainly impacts land  resources.

Point and nonpoint sources refer to types of water pollution.

The process of people moving to cities, called   urbanization , greatly impacts land, air, and water resources.

The burning of fossil fuels can cause smog and acid rain.

Explanation:

4 0
3 years ago
Read 2 more answers
If you compare the egg to a cell, what did you learn about how water moves into or out of a cell
sleet_krkn [62]

If we compare a cell with an egg there is a major difference between the outer membrane

in case of cell they are bounded by semi permeable membrane  

The semi permeable membrane is a selectively permeable membrane which allows the movement of only solvent molecule and not solute molecules through it.

So water can move into or out of the cell through cell membrane by a special physical process known as osmosis.  

the water will move from a low concentration gradient to high concentration gradient.

4 0
3 years ago
What is the pH of a 2.0 x 10^-4 M solution of nitric acid (HNO3)
Semmy [17]

Hello!

datos:

Molarity = 2.0*10^{-4}\:M\:(mol/L)


ps: The ionization constant of the nitric acid is strong (100% ionized in water) or completely dissociates in water, so the pH will be:

pH = - log\:[H_3O^+]

pH = - log\:[2*10^{-4}]

pH = 4 - log\:2

pH = 4 - 0.30

\boxed{\boxed{pH = 3.70}}\end{array}}\qquad\checkmark

Note:. The pH <7, then we have an acidic solution.

I Hope this helps, greetings ... DexteR!

3 0
3 years ago
Read 2 more answers
Which of the following chemical symbols represents the element silver?
Ierofanga [76]
B.Ag from the latin Argentum
6 0
3 years ago
Read 2 more answers
A covalent bond is formed by the sharing of _______ between atoms, whereas an ionic bond is formed by the _______.
OleMash [197]
Electrons and electrons
7 0
3 years ago
Other questions:
  • Draw the structures of the major and minor organic products formed when hbr reacts with 2,4,4-trimethyl-2-pentene in the presenc
    8·1 answer
  • Follow the Carbon in Citric Acid Cycle: 1. How many cycles does it take to convert Acetyl CoA to CO2
    8·1 answer
  • A chemist performed a reaction in which two chlorine atoms form a compound with a magnesium atom through an ionic bond. Which st
    9·1 answer
  • Four type of molecular models
    9·1 answer
  • What is the pH of a solution whose hydronium concentration is 3.5 x 10^(-3) M?<br><br> Thanks!
    10·1 answer
  • How are half-reaction useful?
    11·2 answers
  • In a polar bond, ____<br> are not shared equally between atoms.
    8·2 answers
  • Ughh please help me ​
    8·2 answers
  • **PLEASE HELP** If you were presented with a preserved brain specimen, but weren’t told whether it was from a human or a sheep,
    6·1 answer
  • The ability of nitrogen to attract electrons is
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!