When group 2A element from ion they A. lose two proton
B. gain two proton
C. lose two electron
D. gain two electron

Answers

Answer 1

Answer: Well, knowing that group 2A elements are metals, and metals lose electrons to gain a full electron shell, we can eliminate B and D. Knowing that these are 2 electrons, that the group 2A element provides to another atom, to form an ion.

The solution is C. Lose 2 electrons.

Related Questions

How can filtering produce clean water from dirty water?
Explain why benzoic acid is able to be separated from acetanilide using sodium bicarbonate.
What is the #1 or main component of the earths ancient atmosphere?
One isotope of a metallic element has a mass number 65 and 35 neutrons in the nucleus. The cation derived from the isotope has 28 electrons. What is the charge of this cation?
Which of the following types of organelles are most important in providing a cell with energy

Which element is capable of forming long chains by forming single, double, or triple bonds with itself?

Answers

the answer is carbon

Catenation is the property by which it can make bonds with other carbon atoms to form long chains. Hence, carbon, with the least diffuse valence shell p orbital is capable of forming longer p-p sigma bonded chains of atoms than heavier elements which bond via higher valence shell orbitals.

The heart is protected from the bones by the .

Answers

The heart is protected from the bones by the rib cage or the thoracic cage. It protects both the heart and the lungs. The rib cage is composed of 12 pair of ribs, the sternum and thoracic vertebrae. All ribs are connected to the thoracic vertebrae. The rib cage also do not only protect the heart and lungs but also support the body and aid in respiratory function.

Which of the following statements is not true regarding acids?Most fruits contain weak acids.

Acids react with bases in neutralization reactions to produce water.

Acids can be both highly and mildly corrosive.

Active metals will react with acids in double replacement reactions.

Answers

The correct answer is the last option. Active metals will not react with acids in double replacement reactions. Instead, it reacts with metals via sing replacement reactions. It will displace hydrogen from the acid.

Active metals will react with acids in double replacement reactions.

NH4+

increase the volume
add a catalyst

What is the OH- concentration of a solution whose pH is 12.40?

Answers

pH + pOH = pKw = 14

12.40 + pOH = 14

pOH = 14 - 12.40

pOH = 1.6

[OH⁻] = $10 ^(-pOH)$

[OH⁻] = $10 ^(-1.6)$

[OH⁻] = 2.5x10⁻² M

hope this helps!

How do you tell if a reaction is endothermic or exothermic using only the written formula

Answers

You know if it's endothermic or exothermic by doing the enthalpy reaction. If the change of temperature is negative then it is exothermic, while positive is endothermic. If you get -22K then its exothermic, but if you get +22 its endothermic.

Fibrin is a white blood cell.
True
False