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
kirill115 [55]
3 years ago
8

Calcium’s atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?

Chemistry
1 answer:
Gnom [1K]3 years ago
6 0
It would be a positive charge because it lost two electrons, if the charge was neutral it would be the same amount of protons and electrons, if the charge was negative the electrons would be 20 instead of 18. So in this case it is positive.
You might be interested in
How will adding NaCl affect the freezing point of a solution?
lord [1]

Answer is: adding NaCl will lower the freezing point of a solution.

A solution (in this example solution of sodium chloride) freezes at a lower temperature than does the pure solvent (deionized water).

The higher the solute concentration (sodium chloride), freezing point depression of the solution will be greater.

Equation describing the change in freezing point:  

ΔT = Kf · b · i.

ΔT - temperature change from pure solvent to solution.

Kf - the molal freezing point depression constant.

b -  molality (moles of solute per kilogram of solvent).

i - Van’t Hoff Factor.

Dissociation of sodium chloride in water: NaCl(aq) →  Na⁺(aq) + Cl⁻(aq).

3 0
3 years ago
Read 2 more answers
When energy is transformed, some is wasted. What is a common form of wasted energy in some energy transformations? (Think about
tresset_1 [31]

Answer:

Eletrical

Explanation:

The electric transfers 70% of the input energy to kinetic energy 30% is wasted output energy in the form of thermal energy and sound.

4 0
2 years ago
Which statement describes how chemical formulas, such as H2O, represent compounds
grandymaker [24]

Answer:

Which statements describe how chemical formulas, such as H2O, represent compounds? ... They show the elements that make up a compound. They show the types of atoms that make up a molecule. They show the number of each type of atom in a molecule.

5 0
3 years ago
Read 2 more answers
The last group on the periodic table is called the noble gases. The elements in this group are
Anni [7]

Answer:

C

Explanation:

They are stabil and full of valence electron.

6 0
3 years ago
Which best describes how a pH test strip works?
NISA [10]
Molecules in the paper react differently with Hydronium and Hydroxide.

pH paper deals with acidity and basicity of something.  You are correct in thinking that A is the answer. Always go with your gut. don't be like me when I was in college who always second guessed my answers. Good luck with chemistry.
4 0
3 years ago
Read 2 more answers
Other questions:
  • If you mix 95 degrees C and 5 degrees C what temperature would you get?
    13·1 answer
  • In the reaction MgCl2 + 2KOH Mg(OH)2 + 2KCl, how many moles of Mg(OH)2 are produced for every mole of MgCl2?. A. 3. B. 1. C. 2.
    7·2 answers
  • State one factor that effects the rate of change of the liquid colour​
    6·1 answer
  • The s orbitals are said to be non directional what does it mean
    13·1 answer
  • Force causes
    8·1 answer
  • Please help me! I'm having trouble!
    8·2 answers
  • The chemical process in which small organic molecules called monomers bond together to form a chain is called A) production B) p
    14·1 answer
  • What do all of the cells have in common?
    11·1 answer
  • Please help!!!
    15·1 answer
  • Round off 318.90 to 2 significant figures
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!