Ask question

Ask question

All categories

3 years ago

12

Nitrogen (N) has an atomic number of 7 and an atomic mass of 14. Which of the following correctly shows the electron arrangement

for nitrogen?
A. 2, 7

B. 2, 5

C. 2, 2, 3

D. 2, 8, 4

1 answer:

kiruha [24]3 years ago

5 0

7 protons means that N atom has 7 electrons
1st level can have only 2 e⁻, and we have left over of 7-2=5 e⁻, that will go on the second level.
B. 2,5

You might be interested in

What is the mass percent of oxygen (O) in SO2?

REY [17]

Answer:

49.92%

Explanation:

4 0

2 years ago

What are the special characteristics of chromium, iron , titanium and manganese

adoni [48]

Answer:

The two most useful properties of titanium include its resistance to corrosion and its high strength-to-weight ratio.

Chromium metal is highly valuable due to its high corrosion resistance and hardness.

Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels.

Explanation:

7 0

2 years ago

Most genetic mutations are repaired by____

Kay [80]

The correct Anwser is enzymes

7 0

2 years ago

All are true EXCEPT -- A. skin is an organ B. organs are made up of tissues C. each organ is made up of its own kind of tissue D

AveGali [126]

The Answer is C. glad I could help

6 0

2 years ago

Read 2 more answers

Mila [183]

Answer:

Explanation:

Half life of Nobelium-253 is 97 seconds . That means after every 97 seconds half of the Nobelium amount will be disintegrated .

Time taken in bringing the sample to laboratory = 291 seconds

291 second = 291 / 97 half life

n = 3

N = $N_0 (\frac{1}{2})^n$

N₀ is original mass , N is mass after n number of half life.

N = 5 mg x $(\frac{1}{2})^3$

= .625 mg

Only 0.625 mg of Nobelium-253 will be left .

7 0

2 years ago