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3 years ago

How do you figure out how many valence electrons an element has?

2 answers:

8 0

The valence electron of an atom has the highest energy level and is found on the outermost energy level. It is also the group number

Alik [6]3 years ago

4 0

It's how many are in the element's outer layer. The layers go: 2, 8, then 8.

Ex-6 electrons. 1 layer is 2, the next layer has 4 left. If that layer holds 8, you can do 8-4 and it has 4 valence electrons.

Ex-10 electrons. 1 layer is 2, the next layer has 0 left. It has 8 valence electrons because the outermost layer is full with 8.

ex-11 electrons. 1 layer is 2, the next layer is full as well. 2+8=10; it has 1 left. So that element has only one valence electron.

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How do the particles in s waves move

Darya [45]

In a surface wave, particles of the medium move up and down as well as back and forth in an overall circular motion. The particles don't actually move closer to shore as the waves pass through. In shallow water close to shore, waves start to drag on the bottom of the water.

3 0

3 years ago

How many valence electrons can atoms of non metals have?

Dmitry_Shevchenko [17]

1 to 8 valence electrons

7 0

3 years ago

What is the new pressure of 150 mL of a gas that is compressed to 50 mL when the original pressure was 3.0 ATM and the temperatu

Arisa [49]

Answer:

$\boxed {\boxed {\sf P_2= 9 \ atm}}$

Explanation:

Since the temperature is held constant, we only need to focus on the volume and pressure. We will use Boyle's Law, which states the volume of a gas is inversely proportional to the pressure. The formula is:

$P_1V_1=P_2V_2$

Originally, the gas had a volume of 150 milliliters and a pressure of 3.0 atmospheres. We can substitute these values into the left side of the equation.

$3.0 \ atm * 150 \ mL = P_2V_2$

The original gas was compressed to a volume of 50 milliliters, but we don't know the volume.

$3.0 \ atm *150 \ mL= P_2 * 50 \ mL$

Now, we need to solve for the new pressure (P₂). Multiply on the left side first.

$450 \ atm*mL= P_2 * 50 \ mL$

Since we are solving for the pressure, we need to isolate the variable. It is being multiplied by 50 mL. The inverse of multiplication is division. Divide both sides by 50 mL.

$\frac{450 \ atm*mL}{50 \ mL}= \frac{P_2 * 50 \ mL}{50 \ mL}$

$\frac{450 \ atm*mL}{50 \ mL}= P_2$

The units of milliliters will cancel.

$\frac{450 \ atm}{50 }= P_2$

$9 \ atm =P_2$

The new pressure is <u>9 atmospheres.</u>

8 0

2 years ago

what blood vessels and chambers does a molecule of glucose absorbed through the gut passes on its way to an active muscle in the

posledela

Answer:

Arteries are blood vessels that generally carry oxygen rich blood AWAY from the heart and lungs to the capillaries. The walls of ... and glucose, are absorbed from the digestive system and transported to the cells. Plasma ...

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2 years ago

What is the scientific notation for the expression 0.0000015 cm

PIT_PIT [208]

1.5 × 10^-6 i would think

3 0

2 years ago