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
IrinaVladis [17]
3 years ago
15

A student says: Potassium (K) always has 20 protons. Explain why the student is incorrect.

Chemistry
1 answer:
Katen [24]3 years ago
5 0

Explanation:

19

Potassium/Atomic number

This tells you that potassium has 19 protons and - since the number of protons is the same as the number of electrons- also 19 electrons. To find out the number of neutrons you have to look at the atomic mass or weight of the element. This can also be found in the periodic table.

You might be interested in
Non motile in an sentences
allsm [11]

Answer:

Motile bacteria have flagella, while nonmotile bacteria do not.

Explanation:

4 0
3 years ago
How many molecules are in 777.7 grams of water?
Alisiya [41]

to have the closest number rounded up

7 0
3 years ago
A cork has a mass of 3 grams and a volume of 16 cms calculate the density
REY [17]

hey mate here is ur answer

solution

mass{m}=3 gram

             =3/1000

             

volume{v}=16cm

                =16/100

               

density=m/v

           =3/1000÷16/100

           =3/160

            =0.01875kg/m3

6 0
3 years ago
Water molecules are highly _______ and are always _________.
anyanavicka [17]

Water molecules are highly packed and are always near each other.

7 0
2 years ago
The burning of a solid waste is called
Cloud [144]

Answer:

Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials. Incineration and other high-temperature waste treatment systems are described as "thermal treatment". Incineration of waste materials converts the waste into ash, flue gas and heat.

NOTE: The other person is drunk.

3 0
3 years ago
Other questions:
  • Carbon tetrachloride, CCl4, was once used as a dry cleaning solvent, but is no longer used because it is carcinogenic. At 55.8°C
    6·1 answer
  • In a chemical equation, what do the coefficients indicate?
    7·2 answers
  • . If one mole each of CH4, NH3, H2S, and CO2 is added to 1 liter of water in a flask (1 liter of water = 55.5 moles of H2O), how
    14·1 answer
  • In this diagram, medium A represents water and medium B represents air. The phenomenon in this diagram, moving from A to B, is c
    15·1 answer
  • Calculate the molarity of the two solutions. The first solution contains 0.550 mol of NaOH in 1.40 L of solution.
    10·1 answer
  • Which of the following statements about the nucleus is false?
    8·2 answers
  • A buffer is prepared by mixing 50.3 mL of 0.183 M NaOH with 128.8 mL of 0.231 M acetic acid. What is the pH of this buffer
    12·1 answer
  • An atom of sodium has 11 electrons. Make a sketch of a sodium atom, showing how many electrons it has at each energy level. Infe
    13·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Chuge%5Cmathcal%5Cblue%7BQuestion%7D" id="TexFormula1" title="\huge\mathcal\blue{Question}"
    13·2 answers
  • Find the pH of 0.0025M sodium benzoate
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!