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3 years ago

Which statement is true with respect to an atom?

Chemistry

1 answer:

MissTica3 years ago

7 0

Smallest particle of a(chemical) element

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The blue colour of the sky results from the scattering of sunlight by air molecules. Blue light has a frequency if about 7.5*10^

erastovalidia [21]

Answer: The energy of a mole of photon associated with this frequency is $49.5\times 10^{-20}J$

Explanation:

The energy and frequency are related by :

$E=N\times h\times \nu$

E = energy of photon

N = number of moles = 1

h = planks constant = $6.6\times 10^{-34}Js$

$\nu$ = frequency = $7.5\times 10^{14}Hz$

$E=1\times 6.6\times 10^{-34}Js\times 7.5\times 10^{14}s^{-1}=49.5\times 10^{-20}J$

The energy of a mole of photon associated with this frequency is $49.5\times 10^{-20}J$

6 0

3 years ago

Oxygen is a __________ and nitrogen is a __________. metalloid, metalloid nonmetal, metal nonmetal, nonmetal nonmetal, metalloid

Anna35 [415]

Answer:

"nonmetal, nonmetal"

Explanation:

Oxygen is a non metal and Nitrogen is a non metal. It is 8th element of the periodic table. It is located in period 2 and group 16.

Nitrogen lies at the group 15 of the periodic table. Its atomic no is 7. Its valency is 2.

Hence, the correct option is (c) "nonmetal, nonmetal".

4 0

3 years ago

HELP ASAP 50-50 CHANCE

docker41 [41]

Answer: The answer is A, A new element or different atom formed from the original two.

Hope this helps! :D

-<em>TanqR</em>

4 0

3 years ago

Does neon have a larger atomic radius than argon

Lera25 [3.4K]

Answer:

Explanation:

Argon has a larger atomic radius

6 0

2 years ago

An order is given to administer methylprednisolone, an anti-inflammatory drug, by IV at a rate of 39 mg every 30 min. The IV bag

Korvikt [17]

Answer:

The Flow rate = 0.0208 mL/min

Explanation:

Data provided:

Rate of dose = 39 mg every 30 min = (39/30) mg/min = 1.3 mg/min

also,

125mg of methylprednisolone is present in every 2 mL

thus,

concentration = (125/2) mg/mL = 62.5 mg/mL

Now,

The flow rate is given as:

Flow rate = Rate / Concentration

on substituting the respective values, we get

Flow rate = (1.3 mg/min) / (62.5mg/mL)

The Flow rate = 0.0208 mL/min

3 0

3 years ago