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2 years ago

What element has 4 valence electrons and 5 electron shells?

Chemistry

1 answer:

marta [7]2 years ago

8 0

Answer: Tin (Sn)

Explanation: The electron configuration for tin (Sn) is shown in the picture. It's last electrons are:

5s^2 4d^10 5p^2

The valence electrons are in the 5th electron shell and include 2 each in the 5s and 5p orbitals.

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Calculate the density of a solid that has a volume of 2cm3 and a mass of 3g

katrin2010 [14]

Answer:

The density is 6

Explanation:

p = m × v

p = 3 × 2

p = 6

Hope this helped! :)

8 0

2 years ago

In what type of ratios do atoms combine to form compounds

serious [3.7K]

Answer: whole number ratios

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper $(Cu)$

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions. Example: water $(H_2O)$

Thus the ratio of hydrogen and oxygen is 2: 1 and is a whole number ratio.

8 0

2 years ago

No links plz!!<br>CaOCl2 parent acid and base???

Vesnalui [34]

Answer:

this is not and reaction of acid and base.(CaOCL2)

Explanation:

Ca2, Cl, are base and O is a neutral.

so how can that be a acid and base reaction

4 0

2 years ago

How many valence electrons does Rb (rubidium) have?

Murljashka [212]

Answer:

The total number of electrons in a valence shell is called valence electrons. The electron configuration of rubidium shows that the last shell of rubidium has an electron. Therefore, the valence electrons of rubidium(Rb) are one.

3 0

1 year ago

When 0.2mol of calcium reacts with 880g of water 2.24L of hydrogen gas form at STP How would the amount of hydrogen produced cha

Mila [183]

It would half, you have half the amount of reactant and so you would only produce 1.12 litres of hydrogen

4 0

2 years ago