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3 years ago

Select all the words that describe what the elements have in common if they are located on the same PERIOD.

Chemistry

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

Orbitals

Shells

Energy Levels

Explanation:

Elements in the same period will have the same energy levels which is the same as orbitals and shells.

The period of an element indicates the energy level in an atom.
Elements in period 1 will have one energy level or shell or orbitals.
Down a group this is not the case.
The energy level increases from top to bottom.
As we go down the group, we are transiting from one period to another.

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Mandarinka [93]

Answer:

<h3>What is filteration:</h3>

Filtration, the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that permits the fluid to pass through but retains the solid particles. ... In some processes used in the production of chemicals, both the fluid filtrate and the solid filter cake are recovered.

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<h3>In order to separate a salt-water mixture,</h3><h3>should a student use filtration:</h3>

The mixture can be separated by filtration, by dissolving the mixture in water. Salt will dissolve in the water, whereas sand will not.

Explanation:

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4 0

3 years ago

14. How is the number of neutrons in the nucleus of an atom calculated?

grin007 [14]

Subtract the number of protons from the mass number.

7 0

4 years ago

A car travels 2.5 hours in a Northern direction for 300km. Determine the cats speed and velocity

nika2105 [10]

Answer:

Velocity = 120 km/h in north

Speed = 120 km/h

Explanation:

Given data:

Distance = 300 km north

Time taken = 2.5 hr

Speed and velocity = ?

Solution:

Speed = distance / time

Speed = 300 km / 2.5 h

Speed = 120 km/h

Velocity = change in position / change in time

Velocity = 300 km north / 2.5 hr

Velocity = 120 km/h in north

3 0

3 years ago

An industrial-strength pipe cleaner has a molarity (M) ) of 7.0 a 0.60 liter container. To be safely used on the pipes in a home

Vsevolod [243]

Answer:

1.68L

Explanation:

Step 1:

Data obtained from the question. This includes the following:

Initial Molarity (Mi) = 7M

Initial volume (Vi) 0.6L

Final Molarity (Mf) = 2.5M

Final Volume (Vf) =.?

Step 2:

Determination of the final volume of the solution.

This can be achieved as shown below:

MiVi = MfVf

Divide both side by Mf

Vf = MiVi /Mf

Vf = 7 x 0.6 / 2.5

Vf = 1.68L

Therefore, the new volume of the solution is 1.68L

6 0

3 years ago

You are given a sample containing 0.90 moles of a substance.?. . a) How many atoms are in the sample if the substance is copper?

luda_lava [24]

For every mole of any substance or element, the total number of atoms is 6.022 x 10^23. This is called the avogadro's number. Hence, for a) for a 0.90 mole copper, the number of atoms is 5.42 x10^23. This also applies for B) which gives silver as given. For c), the number of molecules present in a compound is also the same. Thus, for a,b,and c, the answer is 5.42 x10^23.

6 0

3 years ago