what should the charge be for calcium and fluoride ions?

Answers

Answer 1
Calcium ions have a charge of “2+”because they are in group two (column number 2)

Skip over the transition metals

Fluoride ions would have a charge of
“1-” because they are all the way near the end of the table in the second last group (group 7)

Hope that helps :)

Related Questions

Suzanne has a cat and uses a pet carrier to take her cat to the veterinarian. After a few years, the cat runs away and hides every time Suzanne gets the carrier out. Which best describes the cat's behavior? instinct reflex conditioned imprinting

Answers

Answer:

conditioned

Explanation:

The best term to describe the behavior of the cat is conditioned.

The cat has been conditioned to respond in a specific way to the pet carrier over time due to certain experiences - most likely, unpleasant ones. With repeated unpleasant experience associated with the per carrier, the cat has been conditioned to dislike/fear the pet carrier and thus, the recorded behavior.

Answer:

conditioned

Explanation:

Why do electronegativity charts often give no values to the group 18 elements?

Answers

Answer:

Because they have complete electronic configuration

Explanation:

Group 18 elements are known as the noble or inert gases. The elements in this group are non-reactive because they have complete electronic shell configuration.

Electronegativity is the tendency of an atom to attract electrons. The reason why atoms attracts electrons is to have a stable configuration like those of the noble gases. Since the noble gases do not require any extra-electrons to attain stability, they have 0 electronegative values.

Is it possible to view atoms?
Select one:
a. Yes, you can view atoms with the naked eye.
b. Yes, you can view atoms with a light microscope.
c. Yes, you can view atoms with a scanning tunneling microscope.
d. No, it is not possible to view atoms with any kind of microscope.

Answers

Answer:

I think it

C

because you cant view them with a naked eye

The answer is C
You can only see them with a scanning tunneling microscope

What type of reaction would NI3+ ->lead to?

Answers

Answer:

Reduction potential (Eo) is defined as a tendency of a chemical species to be reduced by gaining an electron and is defined with electrochemical reference of hydrogen, which is globally given the reduction potential of zero [24].

Explanation:

Which option is a compound?

Answers

where is the full question

Examples of compounds include table salt or sodium chloride , sucrose (a molecule, nitrogen gas, a sample of copper, and water.

When magnesium ribbon reacts with steam, a solid called magnesium
oxide and hydrogen gas are formed. Which of the following is the correct
word equation?
O magnesium + hydrogen -> magnesium + water
magnesium + water -> magnesium oxide + hydrogen
O magnesium + water -> magnesium + hydrogen
O magnesium + magnesium oxide -> hydrogen + water

Answers

Answer:

magnesium + water == magnesium oxide + hydrogen

draw out the following covalent molecules ​

Answers

Answer:

you did not show the whole page

Explanation:

Sodium metal reacts violently with water and chlorine is a toxic gas, yet we eat sodium chloride. Why is this possible? Select one: a. The properties of compounds are different from the properties of the elements that form the compounds.
b. The properties of compounds are identical to the properties of the elements that form the compounds, and we should not eat sodium chloride because it is toxic.
c. The physical properties of compounds are different from the physical properties of the elements that form the compounds, but the chemical properties of the elements and compound are the same.
d. The chemical properties of compounds are different from the chemical properties of the elements that form the compounds, but the physical properties of the elements and compound are the same.

Answers

Answer:

The properties of compounds are different from the properties of the elements that form the compounds.

Explanation:

When elements form compounds, their properties are significantly modified. The physical and chemical properties of compounds and that of the elements that compose them are significantly different.

The introduction of chemical bonds between different atoms in compounds make the compounds to differ from elements where the atoms are bonded to atoms of the same element.

HELP ME PLEASE!! If given a graduated cylinder, a beaker with alcohol and a scale, explain the steps to find the mass of 40 mL of alcohol.

Answers

Further explanation

In general, some people equate mass and weight.

Mass is one of the principal quantities, which is related to the matter , whereas weight is a force that leads to the center of the earth (Earth's gravitational force)

Steps that can be taken  to find the mass :

1. Weigh graduated cylinder (empty) 2. Pour the alcohol in the beaker into the graduated cylinder to the level of 40 ml 3. Weigh again graduated cylinder + poured alcohol 4. mass of alcohol 40 ml = mass in 3rd step - mass in the first step

calculate the weight of 5 atoms of Mg.​

Answers

Answer:

2.0179701e-22

Explanation:

Milk of Magnesia is a type of medication people can take to help with heartburn and indigestion cause by stomach acid.

If the pH of this solution is 10.5, which phrase would correctly describe Milk of Magnesia?


This substance would turn blue litmus paper to red.


This substance will likely taste sour.


This substance is acidic.


This substance is basic.

Answers

Answer:

This substance is basic.

Explanation:

The milk of Magnesia, a type of medication which can help people with heartburn and with a pH of 10.5 is a basic solution.

Bases are certain metallic oxides, metallic hydroxides and aqueous ammonia. They have the following properties: On the pH scale, they have a value between 7-14They turn red litmus paper blue. Bases are electrolytes. They have a bitter taste. They are soapy or slippery to feel.

Find the molar mass for NaNO3

Answers

Molar mass

= Atomic mass of Na + Atomic mass of N + Atomic mass of O3

= 23 + 14 + (16×3)

= 23 + 14 + 48

= 85 g per mole

what is the function of the cell membrane?​

Answers

Answer:

Its the thin lining around the cell the moniters what gets in and out of the cell.

Explanation:

Barry purchased a whole life insurance policy. Which of the following choices is true?

Answers

Answer:

where the following choices??

Explanation:

In your OWN WORDS, describe what the “Law of Conservation of Energy” is.

Answers

Energy cannot be destroyed or created, but energy could be transformed or transferred. For example a skiier skiing from the mouth can have potential energy transferred into kinetic energy.

A substance has a molecular formula of C8H10N4O2

Answers

The empirical formula of a substance = C₄H₅N₂O

Further explanation  

The empirical formula is the smallest comparison of atoms of compound forming elements.  

A molecular formula is a formula that shows the number of atomic elements that make up a compound.  

(empirical formula) n = molecular formula  

((empirical formula)n=C₈H₁₀N₄O₂

divide by 2 :

(C₄H₅N₂O)₂=C₈H₁₀N₄O₂

what is always true of a week acid??????
A) It only partially dissociates in solution.
B) It does not dissolve in water.
C) It contributes only one proton.
D) It has been diluted with water.

Answers

Answer:

I'm pretty sure it's A

Explanation:

Answer:

for the  a p e x  quiz:

it dissociates completely in solution.

Explanation:

a p e x

How does the suns energy contribute to the movement of water in the water cycle?

Answers

Answer:Evaporation

Explanation:

The suns heat speeds the movement of water molecules, until the molecules move fast enough that they jolt out the surface of the water individually. Overtime the water gradually evaporates into water vapor.

The diagram below shows a longitudinal wave at one instant in its motion. Each oval represents a particle acted on by the energy of the wave as it moves from left to right.

Which line on the diagram indicates a region of rarefaction?

Answers

Answer:

Here now you can give the other person the brainly they deserve and they were right too :)

Explanation:

The line that has been the representation of the region of rarefaction in the diagram has been the line below the top line.

The diagram has been the representation of the movement of the particles under the influence of wave energy. The particles have been moving from left to right in the longitudinal order with a gain of energy.

The rarefaction has been the instance where the density of the waves has been lesser or where there has been one wavelength of the wave.

The diagram has been representing, at the line below the top arrow, there have been lesser density of the wave particles, thus, the region of rarefaction has been the instance in the lines below the top line.

For more information about the rarefaction, refer to the link:

https://brainly.com/question/1326823

Darwin told us that science:
saves lives

Answers

Answer:yup!!

Explanation:

Scientists digging in a cave found an unknown substance. The scientists
found that the substance’s molecules were moving around each other. The scientists
increased the speed of the substance’s molecules and caused a phase change. How
did the scientists do this, and how did this affect the substance?

Answers

Answer:

By adding heat energy

It became a gas

Explanation:

The molecules moving about another is a clear indicator that the substance is a liquid.

In a liquid, the molecules stick together and move about one another.

When the scientist increase the speed of the of substance, the kinetic energy increases. if this increase causes a phase change, then the substance becomes a gas. So, by adding heat energy a substance becomes gaseous if it is a liquid already.

check wether all the answers are correct or not. please?​

Answers

Answer:

H2+NO3=HNO3

Explanation:

becuase HNO3

when an atom loses electrons, what does it become?

Answers

It becomes a cation. Cations lose electrons to become positive charged.

If You are given 14 moles of C2H5OH(Ethanol) and 13 moles of O2( Oxygen), how
many moles of the limiting reactant is produce? C2H5OH + O2 -> CH3COOH +
H2O

Answers

Explanation:

1 ) first u have to balance the equation but in this case it is already balanced.

2) checking for the limiting reactant:

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol of H2O

14 mol of ethanol × (1mol H2O/ 1molof ethanol) = 14 mol of H2O

the less amount of moles produced from the O2 so the limiting reactant is oxygen

3) calculating the products moles

13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol

13 mol O2 × (1mol Ch3Cooh / 1mol O2) = 13 mol

note: the ratios obtained from the balanced equation

4) the excess reagent is the ethanol 1 mol will be remain

perience
How many significant figures does each of the following numbers contain?
11. 163.890
12. 00560
13. 156, 100
14. 906,301
15. 6.022 x1023
16. 5.60 x 10-5
Dorform the fol

Answers

Answer:

11

Explanation:

Calculate the amount of heat needed to evaporate 235.0 grams of water from 25.0°C to 100.0°C.

Answers

I hope this helps answer your question. :)

These problems are very hard to do digitally so I would recommend trying to practice these types of problems on paper :)

The object will have a minimum gravitational potential energy at point
A)A B)B C)C D)D

Answers

Answer: Decrease

Explanation: The downward slope causes the momentum to decrease in speed rather than increase from an higher point.

what do you conclude from the bar graph​

Answers

Answer:

A bar graph shows the relationship between different values of data. Each data value is represented by a column in the graph.

:answer question number 8

Answers

Answer:

Weight

Explanation:

Weight changes because the moon's gravity is different from the Earth's. Mass is always the same. Volume remains the same. Density also remains the same. Hope my answer is correct! If there is a lot of explanation, you can give a brainliest to my answer.

Can someone help me please will give BRAINIEST
Complete the conversions for the following temperature measurements:
55.3C=_____K
255K=_____C
447K=_____C
-14C=_____K

Answers

55.3C= 328.45K
255K= -18.5C
447K= 174.85C
-14C= 259.15K

Answer:

55.3 = 328.45k

255 = 18.15°c

447 = 173.85°c

-14 = 14k

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