3 years ago

The main energy levels of atom are indicated by the

1 answer:

6 0

In chemistry, the principal energy level of an electron refers to the shell or orbital in which the electron is located relative to the atom's nucleus. This level is denoted by the principal quantum number n. The first element in a period of the periodic table introduces a new principal energy level.

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I’m so lost please help

ExtremeBDS [4]

C=4

D=-19

Explanation:

2exp-25/5exp-7= 4exp-19

7 0

2 years ago

What size container is needed to hold 7.00 mol of a gas at 342 K and 255 kPa? *

ValentinkaMS [17]

PV = nRT

I only know the valeu of R is you're using atm, so convert kPa to atm.

1 atm = 101.325 kPa

2.52 atm = 255 kPa

2.52atm(x) = 7(.0821)(342)

2.52atm(x) = 196.5

x = 78

78 liters

3 0

2 years ago

it is often thought that two mutations must happen in a cell to create a cancerous cell. What two cell functions could mutate an

grigory [225]

Answer:

Tumor Suppressor genes,

and proto oncogenes.

Explanation:

can mutate and lead to a cancerous cell.

7 0

2 years ago

Compounds formed from the attraction of oppositely charged ions are called___