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kenny6666 [7]
3 years ago
15

Which statement describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are co

nsidered in order from Na to Cl?
(1) Electronegativity increases, and first ionization energy decreases.

(2) Electronegativity decreases, and first ionization energy decreases.

(3) Electronegativity and first ionization energy both increase.

(4) Electronegativity and first ionization energy both decrease.
Chemistry
2 answers:
Andru [333]3 years ago
8 0
(3) Electronegativity and first ionization energy both increase describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are considered in order from Na <span> to Cl.</span>
Alex17521 [72]3 years ago
4 0
Correct Answer: <span>(3) Electronegativity and first ionization energy both increase.

Reason:
Electronegativity and ionization energy are dependent on effective nuclear charge and size of atom.

As we move along the periodic table from left to right, atomic size decreases and effective nuclear charge increases. The increase in effective nuclear charge and decrease in atomic radii favor ionization energy and electronegativity. 

Hence, in 3rd period (from Na to Cl) electonegativity and 1st ionization energy increases. </span>
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Which element has an atomic number of 16?<br> a. oxygen (O)<br> b. sulfur (S)<br> c. germanium (Ge)
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Answer: Sulfur

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A slice of Swiss cheese contains 47 mg of sodium. (a) What is this mass in grams? .047 (b) What is this mass in ounces? (16 oz =
MAVERICK [17]

Answer:

(a) 0.047 g (b) 0.0016 oz (c) 0.0001 lb

Explanation:

The given mass of the sodium in the slice = 47 mg

(a) Mass has to be calculated in grams

The conversion of mg to g is shown below as:

1 mg = 10⁻³ g

So,

<u>Mass of sodium = 47 × 10⁻³ g = 0.047 g</u>

(b) Mass has to be calculated in ounces

The conversion of ounces to g is shown below as:

453.6 g = 16 oz

Or,

1 g = 16 / 453.6 oz

So,

<u>Mass of sodium = (0.047 × 16) / 453.6 oz = 0.0016 oz</u>

(c) Mass has to be calculated in pounds

The conversion of pounds to g is shown below as:

1 lb = 453.6 g

Or,

1 g = 1/ 453.6 lb

So,

<u>Mass of sodium = (0.047 × 1) / 453.6 oz = 0.0001 lb</u>

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3 years ago
The following reactions take place in the ozone layer by the absorption of ultraviolet light.
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Answer:

Option B will require a shorter wave length of light.

Explanation:

The bonding between Ozone (O3) and Oxygen (O2) can be used to explain why the breaking of oxygen into Oxygen radicals will require a shorter wave length.

  • The bond between Oxygen (O2) is a double bond while Ozone (O3) has an intermediate bond between a double bond and a single bond.
  • The bond order of Oxygen (O2) is equals 2 while that of Ozone (O3) is 1.5. Since the bond order of oxygen is higher, it will require more energy to break the bond compared to breaking the Ozone (O3) bond.
  • Recall that Energy is inversely proportional to wave length.
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In a laboratory investigation, an HCl(aq) solution with a pH value of 2 is used to determine the molarity of a KOH(aq) solution.
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Answer:

blue

Explanation:

KOH is a base therefore it's pH will be above seven. According to table M when tested with the indicator bromcreeol green The solution will turn blue

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