3 years ago

U

1 answer:

7 0

The answer is a. the atomic number represents the total protons and since the atom is neutral the number of protons and electrons are the same. therefore your answer is a.

You might be interested in

Using the periodic table entry below, match the phrases with their corresponding values.

zhannawk [14.2K]

Atomic mass = 39

number of neutrons = 20

Number of protons= 19

Electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

The number of electron in first shell = 2

number of electrons in n=3 shell = 8

5 0

3 years ago

Read 2 more answers

A gas is contained in a thick-walled balloon. When the pressure changes from 39.1 bar to 87.0 bar the volume changes from blank

lidiya [134]

Answer: -

1.34 L

Explanation: -

Initial Pressure P 1 = 39.1 bar

Initial Temperature T 1 = 643 K

Let the initial volume be V 1.

Final pressure P 2 = 87.0 bar

Final temperature T 2 = 525 K.

Final volume V 2 = 0.492 L

Using the equation

$\frac{P1 V 1}{T1} = \frac{P 2 V 2}{T2}$

$V 1 = \frac{P2 V2 T1}{P 1 T2}$

Plugging in the values

We have

V 1 = 87 bar x 0.492 L x 643 K / (39.1 bar x 525 K)

= 1.34 L

Thus, a gas is contained in a thick-walled balloon. When the pressure changes from 39.1 bar to 87.0 bar the volume changes from 1.34 L to 0.492L and the temperature changes from 643K to 525K

4 0

4 years ago

Read 2 more answers

Use the drop-down menus to answer each question. Which component of a river system is made of streams and small rivers that feed

erica [24]

Answer:

1. tributary 2. watersheds 3. divideThis is the correct answer according to E D G E N U I T Y 2020

Explanation:

please give my answer a thanks if it helped you and have a blessed day!

6 0

3 years ago

Read 2 more answers