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masya89 [10]
3 years ago
9

This atom tends to gain an electron in its outer shell so that there are a total of 8 electrons. - The atoms of this element los

e one electron and become cations. - The atoms of this element all have one proton. - __________ atoms all have 2 protons. A. Sodium B. Chlorine C. Helium D. Hydrogen
Chemistry
1 answer:
bonufazy [111]3 years ago
3 0

Answer:

D.  Helium

Explanation:

By definition, the atomic number of an element is the number of protons in its nucleus.  2 protons mean atomic number 2:  Helium.

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PLEASE HELP ME I BEG YOU
VladimirAG [237]

The average kinetic energy of 1 mole of a gas at -32 degrees Celsius is:
 
3.80 x 103 J

The relationship between volume and temperature of a gas, when pressure and moles of a gas are held constant, is: V*T = k.

FALSE

The relationship between moles and volume, when pressure and temperature of a gas are held constant, is: V/n = k. We could say then, that:
If the moles of gas are tripled, the volume must also triple.


 If the temperature and volume of a gas are held constant, an increase in pressure would most likely be caused by an increase in the number of moles of gas.

TRUE

If the vapor pressure of a liquid is less than the atmospheric pressure, the liquid will not boil.

TRUE


35 - AB

36 -  BD

33 - true

34 - False

20 - 6

21 - orthohombic


4 0
3 years ago
Determine the best course of action when acid or base is spilled on the skin. Apply base to an acid burn, or acid to a base burn
Hunter-Best [27]

Answer:

You have to apply the base to an acid burn and vice versa.

Explanation:

4 0
3 years ago
which term is used when sugar is completely dissolved in water                                                                 
GaryK [48]
The term which is used is homogeneous.
when sugar is completely dissolved in the water, the mixture or solution homogeneous, both in same phase and same uniform texture that is liquid.
There two types of mixtures are heterogeneous and homogeneous in different phases.
If sugar is not completely dissolved in water and you see the crystals of sugar in water, then the solution will be heterogeneous.
3 0
4 years ago
BRAINLIESTTT ASAP!!! PLEASE HELP ME :)
andrew11 [14]

The Bohr model was a one-dimensional model that used one quantum number to describe the distribution of electrons in the atom. The only information that was important was the size of the orbit, which was described by the n quantum number. Schr�dinger's model allowed the electron to occupy three-dimensional space. It therefore required three coordinates, or three quantum numbers, to describe the orbitals in which electrons can be found.

The three coordinates that come from Schr�dinger's wave equations are the principal (n), angular (l), and magnetic (m) quantum numbers. These quantum numbers describe the size, shape, and orientation in space of the orbitals on an atom.

The principal quantum number (n) describes the size of the orbital. Orbitals for which n = 2 are larger than those for which n = 1, for example. Because they have opposite electrical charges, electrons are attracted to the nucleus of the atom. Energy must therefore be absorbed to excite an electron from an orbital in which the electron is close to the nucleus (n = 1) into an orbital in which it is further from the nucleus (n = 2). The principal quantum number therefore indirectly describes the energy of an orbital.

The angular quantum number (l) describes the shape of the orbital. Orbitals have shapes that are best described as spherical (l = 0), polar (l = 1), or cloverleaf (l = 2). They can even take on more complex shapes as the value of the angular quantum number becomes larger.

4 0
3 years ago
Explain how you would determine the number of moles of aluminum in 96.7 g of aluminum.
anzhelika [568]

Answer: 3.58moles

Explanation:

7 0
4 years ago
Read 2 more answers
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