3 years ago

According to the Bohr model, what period and group would the element be in on the Periodic Table?

Chemistry

1 answer:

Tom [10]3 years ago

7 0

Answer:

Group: 16 Period: 2

Explanation:

There are 8 protons, which determine that the element is Oxygen. Oxygen is in group 16 and Period 2.

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Generally, what happens to the rate of dissolution for a solid solute when you change from stirring a solution to not stirring i

Makovka662 [10]

The rate of dissolution of a solid solute into the solution decreases when you stop stirring it. Generally, stirring increases the dissolution rate of a solid into a solution. An example is coffee with sugar, the sugar dissolves faster when stirred versus when left to dissolve on its own.

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3 years ago

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erastovalidia [21]

I'd say b, but i'm not 100 percent sure.<span />

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Transuranium elements are artificial and may be prepared by a fusion process in which heavy nuclei are bombarded with light ones

Scilla [17]

Answer:

$_{97}^{345}\textrm{Bk}$

Explanation:

In a nuclear reaction, the total mass and total atomic number remains the same.

Am has an atomic number of 95. So correct reaction is:-

$^{343}_{95}\textrm{Am}+^{4}_{2}\textrm{He}\rightarrow ^A_Z\textrm{X}+2^1_0\textrm{n}$

To calculate A:

Total mass on reactant side = total mass on product side

343 + 4 = A + 2

A = 345

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

95 + 2 = Z + 0

Z = 97

Hence, the isotopic symbol of unknown element is $_{97}^{345}\textrm{Bk}$

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3 years ago

A large weather balloon filled with helium has a volume of 7.00 x 102 L at STP. Which expression should be used to find the mass

balandron [24]

Answer:

mass of Helium = mole of Helium x Molarmass of Helium

Explanation:

Mole of Helium = volume of Helium/ 22.4dm^3/mol

= 7.00 x 10^2/22.4

= 31.25mol

Mass of Helium = mole of Helium x Molarmass of Helium

= 31.25mol x 4g/mol

= 125g

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3 years ago

One day, after much exercise, my friends and I were thirsty. Upon searching through the refrigerator, we found a variety of liqu

antiseptic1488 [7]

Answer:

Water = compound, Orange juice with extra pulp = suspension, Milk = colloid, Calcium = Element, Iced tea = solution.

Explanation:

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3 years ago