3 years ago

How many valance electrons does group #11 have?

Chemistry

1 answer:

galina1969 [7]3 years ago

6 0

It would have 11 valance electrons.

Example/Explanation:

Say we are talking about groups 10. Group 10 would have 10 valance electrons because of the atom's electronic arrangement in the periodic table.

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An element has an atomic number of 92 and a mass number of 234, how many neutrons are there?

Sergio039 [100]

Mass number minus atomic number equals neutrons.
234-92=142

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3 years ago

How many electron domains does IF4+ have?

anyanavicka [17]

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2 years ago

A block of wood has the mass of 180 grams.it is 10 cm long,6 cm wide and 4 cm thick.what is it’s density?

DochEvi [55]

Answer:

0.75 g/cm³

Explanation:

Given data:

Mass of wooden block = 180 g

Length of block = 10 cm

Width of block = 6 cm

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Volume of block = 4 cm × 10 cm× 6 cm

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3 years ago

A particular exosolar system has five planets in total: A, B, C, D, and E. The table lists the orbital periods of these planets

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Answer:

The answer is in the picture below

Explanation:

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2 years ago

The energy required to ionize boron is 801 kJ/mol. You may want to reference (Pages 93 - 98) Section 2.5 while completing this p

earnstyle [38]

Answer:

The frequency is $f = 2,01 * 10^{15} \ Hz$

Explanation:

From the question we are told that

The energy required to ionize boron is $E_b = 801 KJ/mol$

Generally the ionization energy of boron pre atom is mathematically represented as

$E_a = \frac{E_b}{N_A}$

Here $N_A$ is the Avogadro's constant with value $N_A = 6.022*10^{23}$

$E_a = \frac{801}{6.022*10^{23}}$

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$E = hf = E_a$

=> $hf = E_a$

Here h is the Planks constant with value $h = 6.626 *10^{-34}$

$f = \frac{1.330 *10^{-18}}{ 6.626 *10^{-34}}$

=> $f = 2,01 * 10^{15} \ Hz$

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2 years ago