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3 years ago

I have 2 questions:

2 answers:

7 0

The reactivity depends on the elements valence electrons. The need to be stable will make an element become more reactive, In order for an atom to be stable, it needs 8 valence electrons in its outer shell.

Since Calcium is in group 2, it has 2 valence electrons, and would rather give up the electrons. While Sulfur has 6, it would need to gain 2 more to be stable, making it more reactive.

kirill [66]3 years ago

6 0

An atoms valence is the amount of electrons in the outer ring and atoms like to have a valence of 8 so the closer to having 8 in the outer ring the more reactive the atom is so since both elements are 2 away from a valence of 8 theyre equally reactive

You might be interested in

How did Bohr refine the model of the atom? How did Bohr refine the model of the atom? He developed electrochemistry. He discover

BartSMP [9]

Answer:

He developed the concept of concentric electron energy levels

Explanation:

Before Bohr's model, Rutherford's model was proposed. This model explains most of the properties of the atom but failed to explain the stability of the atom.

As per Rutherford's model, electrons revolve around the nucleus in the orbit.

But revolving electron in their orbit around nucleus would give up energy and so gradually move towards the nucleus and therefore, eventually collapse.

Bohr's proposed that the electrons around the nucleus move orbit of fixed energy called "stationary states". Electrons in these stationary states do not radiate energy.

Therefore, proposal of concentric electron energy levels refine the atomic models.

5 0

3 years ago

True or False

DedPeter [7]

Answer:

true

Explanation:

4 0

2 years ago

Read 2 more answers

A major chemical spill occurred five years ago at Bakerâs Beach, the worldâs sole nesting ground for Merrick sea turtles, and pr

AfilCa [17]

Answer:

<em>B. Female Merrick sea turtles begin returning to Bakerâs Beach to lay their eggs when they are ten years old.</em>

Explanation:

Firstly, There was an oil spill five years ago-no eggs hatched.

Now, the number of females coming back to the lay eggs has increased somewhat since the last five years.

The theory is that a period of 5 years is sufficient to assess effect on population.

If the breeding cycle has been found to be ten years long, then the impact of the oil spill on the population (as observed by the number of females returning to lay eggs) will only be perceived in the 10th year.

It undermines the argument that the oil spills don't impact the public.

5 0

3 years ago

Which of the following statements is/are true of oxides? 1. A basic oxide is an oxide that reacts with bases. 2. An acidic oxide

lapo4ka [179]

Answer:

Correct option: <em>3</em>

Explanation:

A basic oxide is an oxide that reacts with water to give base or reacts with acid to form salt

eg:

Sodium oxide reacts with water to produce sodium hydroxide.

Magnesium oxide gives magnesium chloride on reaction with hydrochloric acid

An acidic oxide is an oxide that reacts with water to give acid and reacts with base to give salt.

eg: Carbon dioxide gives carbonic acid on reaction with water .

Sulfur dioxide gives sulfites when reacs reacts with bases.

An amphoteric oxide is an oxide which reacts with base as well acid and it shows because metal have multiple oxidation state and they can form oxide as well hydroxide

$eg: Al_2O_3$

4 0

3 years ago

Select the correct answer.

Zarrin [17]

Answer:

Explanation:

A. C - 6 electrons - 1s2 2s2 2p2

B. O - 8 electrons - 1s2 2s2 2p4

C. N - 7 electrons - 1s2 2s2 2p3

D. Be - 4 electrons - 1s2 2s2

4 0

2 years ago