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4 years ago

Nitrogen is a group 15 element. What does being in this group imply about the structure of the nitrogen atom?

Chemistry

1 answer:

Yanka [14]4 years ago

3 0

Answer:

D. Nitrogen has 5 valence electrons.

Explanation:

Nitrogen is an element in group 5A of the periodic table. Elements in group 5A all contain just 5 valence electrons. (Electrons in the outer shell).

**Elements are organized into these groups in a periodic table based on the number of valence electrons which determines their charge. (Does not apply to transition metals)

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A colorless solution is known to contain one of these ions. Which ion is present if adding dilute HCl produces a white precipita

marta [7]

Answer:

The correct answer is option D.

Explanation:

All the cations given belong to the group-1 cation and will give precipitate of their respective chlorides when HCl is added to their aqueous solution.

$Ag^+(aq)+HCl(aq)\rightarrow AgCl(s)+H^+(aq)$

$Cu^{2+}+(aq)+2HCl(aq)\rightarrow CuCl_2(s)+2H^+(aq)$

$Hg_{2}^{2+}+(aq)+2HCl(aq)\rightarrow Hg_2Cl_2(s)+2H^+(aq)$

$Pb^{2+}+(aq)+2HCl(aq)\rightarrow PbCl_2(s)+2H^+(aq)$

All the precipitates are insoluble in cold water but out of all these only lead(II) chloride is soluble in warm water.

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3 years ago

rank the group 1a elements tested in order of increasing energy emission when electrons returns to the ground state. explain thi

labwork [276]

Answer:

The increasing order of energy emission is as follow

Li < Na < K < Rb < Cs

Explanation:

The Characteristic colors of alkali metals are

Li-crimson red
Na- golden yellow
K- pale violet
Rb and Cs- violet

These flame color show that when we moved from down the group, the wavelength decreases (frequency increases).
As the color of Li is red that shows ,it has less emission energy as compare to Rb and Cs that have color violet (more emission energy).

3 0

4 years ago

Jupiter, Saturn, Uranus, and Neptune are a known as ____.

neonofarm [45]

The outer planets of the solar system that are known as Gas Giants

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3 years ago

How many protons and neutrons are there in an atom of 3.K?

pickupchik [31]

Answer:

A: 11 protons and 21 neutrons

Explanation:

Hopefully this helps!

3 0

3 years ago

what kind of evidence indicates a chemical change ?... a physical change? you may use examples to show softened.

SOVA2 [1]

Some things that can indicate a chemical change are change of odor, change of color, change in temperature or energy, such as the production or loss of heat. An example could be the rusting of metal, there would be a color change of going from a shiny silver to a dirty, splotchy red color. Some things that indicate a physical change are change of appearance like change of shape, etc. It can also be like a change between a solid to liquid to gas. For example, the cutting of a piece of paper.

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4 years ago