Ask question

Ask question

All categories

jek_recluse [69]

2 years ago

11

Why does Al have a larger atomic radius than B

1 answer:

Valentin [98]2 years ago

8 0

Explanation:

While atomic radii DECREASE across a Period, a row of the Period Table, from left to right as we face the Table, atomic radii INCREASE down a Group, a column of the Periodic Table, due to the shielding of the valence electrons by the closed valence shell(s) that intervenes between the nucleus and the valence, outermost electrons.

You might be interested in

Find the partial pressure of helium gas in mmHg

mezya [45]

Answer:

214 mmhg

Explanation:

5 0

2 years ago

The tiara worn by Kate Middleton for her wedding to Prince William of England contains 888 diamonds and belongs to the British m

allsm [11]

Answer:

The number of atoms in the gemstones of that tiara is $8.9125\times 10^{24} atoms$ .

Explanation:

Number of diamonds ion tiara = 888

Mass of each diamond = 1.0 carat = 0.200 g (given)

Mass of 888 diamonds in tiara:

$888\times 0.200 g=177.600 g$

Given that diamond is a form of carbon.

Atomic mass of carbon atom = 12 g/mol

Moles of 77.600 g of carbon = $\frac{177.600 g}{12 g/mol}=14.800 mol$

Number of atoms of carbon 14.800 moles:

$14.800 mol\times 6.022\times 10^{23} atoms =8.9125\times 10^{24} atoms$

The number of atoms in the gemstones of that tiara is $8.9125\times 10^{24} atoms$ .

5 0

3 years ago

Why don’t we include the mass of an atoms electrons in the atomic mass?

Daniel [21]

Because Electrons have a negative charge

8 0

3 years ago

Helium occupies a volume of 3.8 L at –45°C. What was its initial temperature when it occupied 8.3 L?

USPshnik [31]

Answer:

98.3 gradius Celsius

Explanation:

This problem is solved using the Ideal Gas Equation

pV = nRT

...

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

3 0

3 years ago

What is the name for a nuclear particle that has about the same mass as a neutron, but with a positive charge?

KATRIN_1 [288]

proton is the name for a nuclear particle that has about the same mass as a neutron, but with a positive charge.

3 0

3 years ago