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Xelga [282]
2 years ago
14

Which of the following represents a stable octet? A 1s2 2s2 2p6 3s2 3p6 4s2

Chemistry
1 answer:
gregori [183]2 years ago
3 0
[Ne]3s^23p^6  ( answer D)   represent a sample of an octet. Octet  is the tendency   of  an atom  to have  eight  electrons  in the valence  shell.  [Ne]3s^2 3p^6   is an  octet   since  its  valence  electron   that is3s^23p^6  has eight  electrons.
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Suppose you mix one mole of sulfuric acid (H2SO4) with 1 mole of sodium hydroxide(NaOH).
olasank [31]

Answer & Explanation:

  • The neutralization of H₂SO₄ with NaOH is occurred according to the balanced equation:

<em>H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O,</em>

It is clear that every 1.0 mol of H₂SO₄ needs 2 mol of NaOH to be neutralized completely.

<em>So, when you mix one mole of sulfuric acid with 1 mole of sodium hydroxide, there will be an excess of sulfuric acid.</em>

<em>Thus, the pH of the solution remain below 7.</em>

7 0
3 years ago
The central Xe atom in the XeF4 molecule has ________ unbonded electron pair(s) and ________ bonded electron pair(s) in its vale
Dimas [21]

Answer:

Lewis structure in attachment.

Explanation:

Atoms of elements in and beyond the third period of the  periodic table form some compounds in which more than eight electrons surround the  central atom. In addition to the 3s and 3p orbitals, elements in the third period also  have 3d orbitals that can be used in bonding. These orbitals enable an atom to form  an <u>expanded octet</u>.

The central Xe atom in the XeF₄ molecule has <u>two</u> unbonded electron pairs and <u>four</u> bonded electron pairs in its valence shell.

8 0
2 years ago
A single human body cell typically contains thousands of
Nitella [24]
The answer to your question should be genes. 

3 0
3 years ago
I have no idea how to do this, any help would be appreciated
aksik [14]
Proton number = the atomic number (which is the smaller number
neutron number = the mass number (the bigger number) - the atomic number
number of electrons = the atomic number - the charge (it depends on the element but group 1 is +1 group 2 is +2 group 3 is +3 group five is -3 group six is -2 group seven is -1


i would solve the whole thing but its unclear hope this helps tho
6 0
2 years ago
Isotopes of elements have different:
Morgarella [4.7K]
Isotopes of elements have same atomic numbers and different mass number(atomic masses).
7 0
2 years ago
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