All categories

2 years ago

According to its periodic table entry, how many electrons does nitrogen have in its valence level?

1 answer:

3 0

The valence level of an atom refers to the number of electrons that reside in the upper most energy level. Nitrogen has an atomic number of 7 and therefore has 7 electrons. The first energy level (1) holds 2 electrons, leaving 5 electrons to reside in the second energy level (2s and 2p). Therefore the valence of nitrogen is 5.

You might be interested in

Identify the mixture of gasoline and motor oil and suggest a technique for separating their components. 1. homogeneous; decantin

alexgriva [62]

Answer:

4. homogeneous; distillation

Explanation:

Gasoline and motor oil are chemically similar. They are both mixtures of non polar hydrocarbons containing carbon and hydrogen atoms. However, motor oil is much more viscous Motor Oil. Hence we can say that the mixture of gasoline and motor oil are homogeneous and they can be separated by distillation.

4 0

3 years ago

Read 2 more answers

Which units can be used to measure length or distance? Check all that apply.

motikmotik

Answer:

Meter, kilometer & inch - used to measure length or distance.

8 0

2 years ago

A scientist performs an experiment in which a radium–226 (Ra–226) atom decays into radon–222 (Rn–222). The scientist concludes t

tangare [24]

Answer:

Explanation:

5 0

2 years ago

Read 2 more answers

Prepare 10.00 mL of 0.010 M NaOH by diluting the NaOH solution used in Trial 1. (Your procedure should clearly show your calcula

denis-greek [22]

Answer:

= 0.2 mL.

Explanation:

Given a 0.5 M solution of NaOH as stock solution, 10.0mL of 0.010M can be prepared via dilution with distilled water, by using the formula:

$C_{1} V_{1} = C_{2} V_{2}$

where C1 and V1 are initial concentration and volume respectively; same as C2 & V2 for fina.

Let C1 = 0.5M, V2 = ?

C2 = 0.010M; V2 = 10mL

⇒Volume of stock solution to be diluted, V2

= $\frac{10}{0.5}$ × 0.010

= 0.2 mL.

Glasswares used would be pipette (for smaller volume experiment) and measuring cylinder. 0.2mL would be measured and then made upto the 10mL mark of the measuring cylinder.

I hope this was a detailed explanation given the missing details of "Trial 1" in the question.

3 0

3 years ago

Skydivers jump out of planes with only the backpacks on their backs. Of course, these packs contain the parachutes that keep sky

UkoKoshka [18]

the force of gravity

8 0

2 years ago

Read 2 more answers