All categories

3 years ago

Elements in the same group have similar properties because they have the same number of ?

Chemistry

2 answers:

Masja [62]3 years ago

8 0

Because their electronic configurations have the same number of electrons in the outermost shell.

solmaris [256]3 years ago

8 0

Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level. Group 1 elements are reactive metals called the alkali metals.

You might be interested in

If Salt is NaCl, what atoms does the compound contain?

allochka39001 [22]

Na is the elemental abbreviation for sodium, and Cl is the abbreviation for chlorine.
When the two are combined, you get sodium-chloride, or table salt.
Hope that helped =)

8 0

3 years ago

What happens when you put magnesium carbonate and diluted water

Rina8888 [55]

Answer:

Magnesium carbonate doesn't dissolve in water, only acid, where it will effervesce (bubble).

Explanation:

An insoluble metal carbonate reacts with a dilute acid to form a soluble salt. Magnesium carbonate, a white solid, and dilute sulfuric acid react to produce magnesium sulfate. Colourless magnesium sulfate heptahydrate crystals are obtained from this solution.

8 0

3 years ago

What is the mass percent of nitrogen in: 1. N2O 2. NO 3. NO2 4. N2O2

Temka [501]

We’re going to use the mass percent formula shown below:

For the percent by mass N, we’re going to rewrite the equation as:

98% (271 ratings)
View Complete Written Solution
Problem Details
Calculate the mass percent composition of nitrogen in each nitrogen-containing compound:

c. NO2

5 0

2 years ago

Which is the correct formula for potassium sulfite

rusak2 [61]

Explanation:

K2SO3

hope it helps!

.....

3 0

3 years ago

Elements donate 2 electron to produce a cation with a 2+ charge

hammer [34]

Answer: alkaline earth metals (group-IIA)

Explanation:

The element which donates the electron is known as electropositive element and forms a positively charged ion called as cation. The element which accepts the electrons is known as electronegative element and forms a negatively charged ion called as anion.

Alkaline earth metals donate 2 valence electrons to acquire noble gas configuration.

For example: Berrylium is the first alkaline earth metal with atomic number of 4 and thus has 4 electrons

Electronic configuration of berrylium:

$[Be]:4:1s^22s^2$

Berrylium atom will loose two electrons to gain noble gas configuration and form berrylium cation with +2 charge.

$[Be^{2+}]:2:1s^2$

Thus Elements donate 2 electron to produce a cation with a 2+ charge are alkaline earth metals.

5 0

3 years ago