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4 years ago

Name at least 3 ways the Periodic Table is organized. *

Chemistry

2 answers:

Lesechka [4]4 years ago

8 0

Answer:

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

Explanation: Cause I'm smart like that!

forsale [732]4 years ago

6 0

Answer and Explanation:

There are various ways the periodic table is organized.

One way is by increasing atomic number, which is also the number of protons an element has. As you move to the right and down, the atomic number increases.

Another way is by increasing atomic mass, which is the mass of the element in atomic mass units (amu); this is also numerically equivalent to the molar mass, which is the mass per mole of the element. As you move to the right and down, the atomic mass increases.

Each column is called a group, while each row is called a family. Within the groups/columns, the elements have various properties. For example, Group 1 elements are alkali metals, Group 2 are alkaline-earth metals, Group 17 is halogens, Group 18 is noble gases, etc.

Hope this helps!

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3 years ago

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You already converted mass to moles for the reactants now convert mass to moles for the product, copper 0.71 g Cu equals

skelet666 [1.2K]

Answer: 0.011 moles.

Explanation:-

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

Given :

Mass of copper = 0.71 g

Molar mass of copper = 63.5 g/mol

Putting i the values, we get:

$\text{Number of moles of copper}=\frac{0.71g}{63.5g/mol}=0.011moles$

Thus the number of moles of copper in 0.71 g of copper is 0.011 moles.

3 0

4 years ago

I need help with this

lys-0071 [83]

Answer:

Fossils are the some traces or portions of the animals or plants, buried and preserved from past in rocks, sediments or ice.

Explanation:

Correct match is as follows-

Mold and cast fossils- An organism is buried in sediment after it dies.The hard part of organism leave behind a empty space imprinted in the rock. Later sediments and minerals fill the space and harden to make the original copy of the organisms.
Carbon film fossils- An organism buried in sediments gets squeezed and heated inside the earth , leaving behind a thin carbon outline of the organism on a rock.
Amber fossil- An organism covered in tree resin or tree sap , which then hardens with the body of the organisms preserved inside.
Ice fossil- An organism dies in a cold place on earth , its body becomes frozen and covered in layers of ice . The hard and soft part of the body may be preserved.

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4 years ago

Why might a metallic compound be mistaken for an ionic compound, based on its physical properties?

devlian [24]

Answer:

(D). Both metallic and ionic compounds can conduct electricity when molten. However, only metallic compounds can conduct electricity in a solid state.

Explanation:

Metallic compound have the ability to conduct electricity. Since they are Metals they have loosely held electrons which can contribute to electricity conduction.

Ionic compound are brittle physically, ionic compound cannot conduct electricity while being in solid state as the ions are held strongly by electrostatic force of attraction, they can only conduct electricity while they are in molten or aqueous state. In molten state they are forming ions, and ions are free to move within the solution and therefore contribute to electricity conduction.

3 0

3 years ago

A slice of pizza has 500 kcal. If we could burn the pizza and use all the heat to warm a 50-L container of cold water, what woul

gayaneshka [121]

Answer:

10°C

Explanation:

Heat gain by water = Heat lost by the slice of pizza

Thus,

$m_{water}\times C_{water}\times \Delta T=Q$

<u>For water: </u>

Volume = 50.0 L

Density of water= 1 kg/L

So, mass of the water:

$Mass\ of\ water=Density \times {Volume\ of\ water}$

$Mass\ of\ water=1 kg/L \times {50.0\ L}$

Mass of water = 50 kg

Specific heat of water = 1 kcal/kg°C

ΔT = ?

For slice of pizza:

Q = 500 kcal

So,

$50\times 1\times \Delta T=500$

ΔT = 10°C

Increase in temperature = 10°C

3 0

3 years ago