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
igor_vitrenko [27]
3 years ago
5

How many valence electrons does calcium want to gain or lose to have a full outer shell?

Chemistry
2 answers:
klemol [59]3 years ago
8 0

Explanation:

calcium has 2 valence electrons

grandymaker [24]3 years ago
4 0

Explanation:

For example, Identify the number and type of ions formed in a reaction of calcium and carbon. Step 1: Determine the number of valence electrons for each element and whether the element loses or gains electrons. Calcium has 2 valence electrons and is a metal so it will give up two electrons.

You might be interested in
Calculate the change in enthalpy for the following reaction, using the bond enthalpy data provided below. (Note: you may round t
aliina [53]

Answer:

-514 kJ/mol

Explanation:

The bond enthalpy which is also known as bond energy can be defined as the amount of energy needed to split one mole of the stated bond. The change in enthalpy of a given reaction can be estimated by subtracting the sum of the bond energies of the reactants from the sum of the bond energies of the products.

For the given chemical reaction, the change in enthalpy of the reaction is:

ΔH_{rxn} = [2(409) + 4(388) + 3(496) - 4(630) - 4(463)] kJ/mol = 818 + 1552 + 1488 - 2520 - 1852 = -514 kJ/mol

3 0
3 years ago
NEED HELP ASAP! Newton's Law of Gravity says that any the effect of gravity between two objects depends on what two factors?
kari74 [83]

Answer:

C. Distance and mass.

Explanation:

Objects that have greater mass have more force of gravity between them.

3 0
3 years ago
I WILL GIVE BRAINLIST IF YOU DO THIS
LuckyWell [14K]

Answer for number 1.   Weight is the force of gravity. It acts in a downward direction—toward the center of the Earth.

Lift is the force that acts at a right angle to the direction of motion through the air. Lift is created by differences...

Thrust is the force that propels a flying machine in the direction of motion. Engines produce thrust.

2. For an airplane to takeoff, thrust must be greater than drag and lift must be greater than weight. To maintain level flight, lift must equal weight and thrust must equal drag. For landing, thrust must be less than drag, and lift must be less than weight.

3.When the forward forces are bigger than the opposing forces, you speed up (accelerate). As you go faster, the force of air resistance pushing back on you increases. Eventually, the forces become balanced (the forward forces are the same size as the opposing forces). Once the forces become balanced, your speed stays the same.

4.Every object on Earth has weight, a product of both gravity and mass. A Boeing 747-8 passenger airliner, for instance, has a maximum takeoff weight of 487.5 tons (442 metric tons), the force with which the weighty plane is drawn toward the Earth.

8 0
3 years ago
If the volume of two containers stays the same , and one containers temperature is lowered, what happens to the pressure in the
melisa1 [442]
Gay-Lussacs law states that pressure is directly proportional to temperature at constant volume.
in this case the volumes of the 2 containers remain the same therefore volume is constant.
P/ T = k
where P - pressure, T - temperature and k - constant 
when temperature decreases the pressure too decreases and vice versa.
if temperature of one container is lowered the pressure also reduces.
since one containers temperature is lowered the pressure in that container reduces. 

answer is when temperature is lowered, pressure too is lowered. 
5 0
3 years ago
¿ a que se encuentra 20 moles de un gas ? ¿ si estan sometidos a 36°C en un recipiente de 20 litros?​
eimsori [14]

Answer:

can be you nice people my friend bother my sister community of college students who have had some experience in this industry and maddie intro and maddie highlights

8 0
2 years ago
Other questions:
  • A 25.00 ml solution of sulfuric acid H2SO4 is titrated to phenolphthalein end point with 27.00 ml of 1.700 M KOH
    10·1 answer
  • Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coeffici
    11·2 answers
  • Calculate the standard free energy change for the combustion of one mole of methane using the values for standard free energies
    5·1 answer
  • The Lewis dot model of a molecule is shown. A visual diagram of a PCl3 molecule is shown. Phosphorous is the central atom with a
    14·2 answers
  • a container of plant food recommends an appilcation rate of 630g/ha. If the container holds 15kg of plant food, how many square
    8·1 answer
  • Which matter exists in the liquid state at room temperature? A. lead B. nebula C. apple juice D. carbon monoxide
    14·1 answer
  • Which of the following is true regarding atomic radius?
    7·1 answer
  • Anyone help plz <br> And ty
    13·1 answer
  • If 3.1 moles of potassium chloride react with oxygen, how many moles of potassium chlorate would be produced?
    8·1 answer
  • Chemistry
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!