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Nesterboy [21]
3 years ago
7

3. Make an argument for placing hydrogen in the halogen group rather than the alkali metals. 4. Compare and contrast ionization

energy and atomic radius. 5. When the element with the atomic number of 119 is discovered, what group will it be in? Explain your logic. 6. A new element is discovered that is very unstable and highly reactive, and it likes to lose its one valence electron. In what group should this element be placed in? Explain.
Chemistry
1 answer:
BlackZzzverrR [31]3 years ago
6 0

Explanation:

Question 3

Hydrogen is an element with a single electron and proton. It has no neutron.

  • The electronic configuration of hydrogen is given as 1s¹
  • The maximum of number of electrons in the S-subshell is just 2.
  • In order to complete its octet and be like the closest noble gas which is helium, it must be willing to accept one more electron.
  • The halogens in group 7 also have this unique property. They all have 7 electrons in their valence shell. This implies that they only need just an electron to complete their octet.
  • This shared property of hydrogen and the halogens makes for a strong reason for the element to be in group 7.

Learn more:

halogens brainly.com/question/1380547

#learnwithBrainly

--------------------------------------------------------------------------------------------------------------

Question 4

Comparison:

  • Ionization energy is a measure of the readiness of an atom to lose an electron. The lower the value, the easier it is for an atom to lose an electron and vice versa.
  • The atomic radius is the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid state of metals.
  • The atomic radius like the ionization are periodic trends and they tell about the nature of elements on the periodic table.

Contrast:

  • Atomic radius is estimated using two nuclei of an atom but ionization is determined for a single element.
  • Atomic radius increases down a group on the periodic table whereas ionization energy decreases down a group.
  • Across a periodic table, atomic radii decreases progressively from left to right but ionization energy increases across a period.

Learn more:

calculations using atomic radius brainly.com/question/5048216

Ionization energy brainly.com/question/6324347

#learnwithBrainly

--------------------------------------------------------------------------------------------------------------

Question 5

The element when discovered will be in group 1. This is the group of the alkali metals. These metals are highly reactive.

  • The shell structure of the element will be 2,8 18,32,32,18,8,1
  • A neutral atom will have a notation of  [Og] 8s¹
  • This further implies that it will be in the s-block.
  • The outer electrons are useful in determining the periodic groups of elements.
  • For elements in group 1, they all have 1 valence electron. Those in group 8 have eight outermost electron.

Learn more:

periodic table brainly.com/question/2014634

#learnwithBrainly

--------------------------------------------------------------------------------------------------------------

Question 6

The element will be group 1 as an alkali metal.

  • Group 1 elements are known for their high reactivity and their willingness to loose their valence electron.
  • Elements gain, lose or share electrons in order to attain stability.
  • The loss of the element's valence electron confers a special stability on them and makes them achieve an octet configuration.
  • Therefore the element will fit perfectly well in group 1.

Learn more:

periodic functions  brainly.com/question/11730855

#learnwithBrainly

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What best explains why sodium is more likely to react with another element than an element such as neon
goblinko [34]

Answer: Neon is not reactive (full valence shell)

Explanation:

Neon is a noble gas and has a stable structure (8 valence electrons) -therefore, is not very reactive.

3 0
3 years ago
The element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table b
denis-greek [22]

Answer:

220.42098 amu

Explanation:

(220 .9 X  .7422) + (220 X .0.1278) + (218.1 X 0.13) =     220.42098 amu

These are weighted averages.

So, we will take mass of one and multiply by abundance percentage that is provided and add them together.

In order to calculate the  average atomic mass, we have to convert the percentages of abundance to decimals. So, you get

(220 .9 X  .7422) + (220 X .0.1278) + (218.1 X 0.13) =     220.42098 amu

6 0
3 years ago
Suppose a salt and a glucose solution are separated by a membrane that is permeable to water but not to the solutes. the nacl so
stira [4]
1)

<span>m(NaCl) = 1.95 g
V(H2O) = 250mL
M(NaCl) = </span><span>58.5 g/mole

Since waters density value is 1g/mL, it can be assumed that volume and mass of water are same values:

</span>V(H2O) = 250ml = 250g = 0.25 kg<span>

</span><span>molality of NaCl:
</span><span>
n(NaCl)=m/M=1.95/58.5= 0.033 mole

</span>molality b(NaCl)=n(NaCl) / V (H2O)= 0.033/0.25 = 0.132 mol/kg
<span>
milimolality of NaOH = 0.132/0,001 = 132 mmole/kg
</span>
milliosmolality of NaOH = milimolality x N of ions formed in dissociation

Since NaCl dissociates into 2 ions in solution:
<span>                                        
</span>milliosmolality of NaOH = 132 x 2 = 264  osmol<span>es/kg
</span>
2)

m(gl) = 9 g
V(H2O) = 250mL
M(NaCl) = 180 g/mole

Since waters density value is 1g/mL, it can be assumed that volume and mass of water are same values:

V(H2O) = 250ml = 250g = 0.25 kg

molality of glucose:

n(gl)=m/M=9/180= 0.05 mole

molality b(gl)=n(gl) / V (H2O)= 0.05/0.25 = 0.2 mol/kg

milimolality of glucose = 0.132/0,001 = 200 mmole/kg

milliosmolality of glucose = milimolality x N of ions formed in dissociation

Since glucose does not dissociate, milimolality and milliosmolality are same:
                                        
milliosmolality of glucose = 200 osmoles/kg

3)

The osmosis represents the diffusion of solvent molecules through a semi-permeable membrane that allows passage solvent molecules but does not to the dissolved substance molecule. The osmosis occurs when the concentrations of the solution on both sides of the membrane are different. Since the semi-permeable membrane only permeates the solvent molecules, but not the particles of the dissolved substance, it occurs the solvent diffusion through the membrane, i.e. the solvent molecules pass through the membrane to equalize the concentration on both sides of the membrane. Solvents molecules move from the middle with a lower concentration in the middle with a higher concentration of dissolved substances.

In our case, osmosis will occur because the concentration of NaCl solution and the concentration of glucose solution do not have same values. Osmosis will occur in the direction of glucose solution because it has a lower concentration.

3 0
3 years ago
What do protons determine about an element
Daniel [21]
The number of protons in an atoms determines the atoms identity. Electrons determine the electrical charge.
5 0
3 years ago
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The process or method , by which a magnet loses its power , is called…………………… ..
andrey2020 [161]

Answer:

I think it is called demagnetisation.

3 0
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