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
Elena L [17]
2 years ago
14

ANSWER THESE 5 MULTPLE CHOICE QUESTIONS!!! I'LL GIVE 30 POINTS AND A BRAINIEST:)

Chemistry
2 answers:
Delvig [45]2 years ago
5 0
1 , mag shells a, d i hope this helped
mestny [16]2 years ago
3 0

Answer: 1, magnesium & mg

2, two energy shells

Explanation:

You might be interested in
For the vaporization of a liquid at a given pressure: A.ΔG is positive at all temperatures. B.ΔG is negative at all temperatures
MArishka [77]

Answer:

C. ΔG is positive at low temperatures, but negative at high temperatures (and zero at some temperature).

Explanation:

Since we need to give energy in the form of heat to vaporize a liquid, the enthalpy is positive. In a gas, molecules are more separated than in a liquid, therefore the entropy is positive as well.

Considering the Gibbs free energy equation:

ΔG= ΔH - TΔS

          +        +

When both the enthalpy and entropy are positive, the reaction proceeds spontaneously (ΔG is negative) at high temperatures. At low temperatures, the reaction is spontaneous in the reverse direction (ΔG is positive).

5 0
3 years ago
Pre-Lab Study Questions / 9
jok3333 [9.3K]

Answer:

See detailed answer with explanation below.

Explanation:

Valence electrons are electrons found on the outermost shell of an atom. They are the electrons in an atom that participate in chemical combination. Recall that the outermost shell of an atom is also referred to as its valence shell. Let us consider an example; if we look at the atom, sodium-11, its electronic configuration is 2,8,1. The last one electron is the valence electron of sodium which is found in its outermost or valence shell.

Positive ions are formed when electrons are lost from the valence shell of an atom. For instance, if the outermost electron in sodium is lost, we now form the sodium ion Na^+ which is a positive ion. Positive ions possess less number of electrons compared to their corresponding atoms.

Negative ions are formed when one or more electrons is added to the valence shell of an atom. A negative ion possesses more electrons than its corresponding atom. For example, chlorine(Cl) contains 17 electrons but the chloride ion (Cl^-) contains 18 electrons.

In molecular compounds, a bond is formed when two electrons are shared between the bonding atoms. Each bonding atom may contribute one of the shared electrons (ordinary covalent bond) or one of the bonding atoms may provide the both shared electrons (coordinate covalent bond). The shared pair may be located at an equidistant position to the nucleus of both atoms. Similarly, the electron may be drawn closer to the nucleus of one atom than the other (polar covalent bond) depending on the electro negativity of the two bonding atoms.

The electrons are shared in order to complete the octet of each atom by so doing, the both bonding atoms now obey the octet rule. For example, two chlorine atoms may come together to form a covalent bond in which each chlorine atom has an octet of electrons on its outermost shell.

4 0
3 years ago
Lagta ha bhaijaan sa sab bahenjaan naraz haan koi bat ni kr raha​
Fiesta28 [93]

Answer:

maybe,lol

Explanation:

5 0
2 years ago
(11) Indicate which of the following atomic models best fits the atomic model of
Rzqust [24]
Dnndhdfbbdhdhxbfbdbbds
6 0
3 years ago
Which of the following has the greatest heat capacity?
Deffense [45]
1000 g of water

The answer is A
6 0
3 years ago
Read 2 more answers
Other questions:
  • Convert -230,000J to kJ
    12·1 answer
  • 1.54 inches = millimeters
    10·1 answer
  • Uranium atoms each have 92 protons. How many protons does each U-238 atom have?
    10·2 answers
  • Is the gene for sickle cell anima likely to be dominant or recessive
    10·1 answer
  • Peyote has effects similar to those of __________, but with different types of hallucinations.
    7·1 answer
  • Please Help!!!
    9·1 answer
  • How can you difference between NAOH and NH4OH ?
    12·1 answer
  • PLZ HELP! I WILL GIVE BRAINLIEST!
    8·1 answer
  • If a wave has a period of 0.25 seconds, what is its frequency?
    9·1 answer
  • 2 moles of a gas have a pressure of 2 atm at a temperature of 300 K. What is the volume of the gas?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!