All categories

3 years ago

Explain why Lithium (Li) and Nitrogen (N)/ have different amounts of valence electrons but

Chemistry

1 answer:

sveticcg [70]3 years ago

4 0

Answer:

Li⁺, Na⁺ (group 1); N⁻³ (group 15)

Explanation:

Li and Na belong to group 1 of the periodic table so they coincide in the valence electrons which, being group 1, is a single electron.

They are very willing to lose it because they have little electronic affinity. In addition, both elements enter the alkali metal group (all of group 1)

They are cations, as they make ionic bonds.

N is an element from group 15. It is a nonmetal and has 5 electrons in its last layer as all the elements that make up its group, P, As, Sb so it would subtract 3 more electrons to have its last complete level and thus reach noble gas configuration.

Nitrogen can make covalent bonds, for example with O, where they form anions because it can gain electrons.

You might be interested in

A 14.3-cm3 sample of tin has a mass of 0.104 kg.

VladimirAG [237]

This is a true statement if it is density you are looking for... Density problem.....

Density is the ratio of the mass of an object to its volume.
D = m / V
D = 104g / 14.3 cm³ = 7.27 g/cm³ .............. to three significant digits

The conventions for the units of density is that grams per cubic centimeter (g/cm³) are usually used for solids, but will work for anything. Grams per milliliter (g/mL) are usually used for liquids and grams per liter (g/L) are for gases. Therefore, by convention, the units for tin (a solid) should be in grams per cubic centimeter.

Since 1 mL is equivalent to 1 cm³, then the density could be expressed as 7.27 g/mL.

The accepted value for the density of tin is 7.31 g/cm³

7 0

3 years ago

Caffeine is one of many naturally occurring chemicals in tea plants that plays two important roles: protecting the plant from pr

AnnyKZ [126]

Caffeine is more soluble in dichloromethane and the both are separated by evaporating the solvent.

Caffeine is an organic plant material which is more soluble in non-polar solvents than in polar solvents. As such, caffeine is more soluble in dichloromethane than in pure water.

In order to carry out a liquid-liquid exaction of dichloromethane from a commercial teabag, the dichloromethane is mixed with water. The caffeine is found to be more soluble in the organic dichloromethane layer than in water.

The two solvents can now be separated using a separating funnel and the solution is evaporated to obtain the caffeine.

Learn more: brainly.com/question/967776

6 0

2 years ago

What is the mole fraction of NaCl in a mixture containing 7.21 moles NaCl, 9.37 moles KCL, and 3.42

GrogVix [38]

Answer : The mole fraction of NaCl in a mixture is, 0.360

Explanation : Given,

Moles of $NaCl$ = 7.21 mole

Moles of $KCl$ = 9.37 mole

Moles of $LiCl$ = 3.42 mole

Now we have to calculate the mole fraction of $NaCl$ .

$\text{Mole fraction of }NaCl=\frac{\text{Moles of }NaCl}{\text{Moles of }NaCl+\text{Moles of }KCl+\text{Moles of }LiCl}$

Now put all the given values in this formula, we get:

$\text{Mole fraction of }NaCl=\frac{7.21}{7.21+9.37+3.42}=0.360$

Therefore, the mole fraction of NaCl in a mixture is, 0.360

3 0

3 years ago

The nucleus of an element contains more protons then electrons.this is referred to a?

dedylja [7]

Answer:

ion

However atoms may gain or lose electrons in ordinary chemical reactions. If an atom has the same number of electrons as protons, it is a neutral atom. If it has a net charge, (more or less electrons than protons) it is an ion. If it has more electrons than protons it has a net negative charge and is known as an anion.

Explanation:

3 0

3 years ago

During an investigation, similar glow sticks were placed in two beakers containing water at different temperatures. A record of

allochka39001 [22]

Answer:

i got you dawg just gimme one sec i'll get to you fr g

Explanation:

6 0

3 years ago

Read 2 more answers