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3 years ago

The first two columns in the periodic table react with? A) Gases B) Metals C) Water

Chemistry

2 answers:

timofeeve [1]3 years ago

8 0

It should be A because the periodic table starts with Hydrogen in this one is a gas

alina1380 [7]3 years ago

4 0

They react with water

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g. What is crystallization?Name any two go mixtures that can be separated by this method:name any two mixtures that can be separ

Masteriza [31]

crystallization is a process which helps to separate a pure solid from a solution in its crystal form. This is the in use to purify solid. For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.

Sugar and salt are examples of products where crystallization does not only serve as separation/purification technique, but where it is also responsible for getting crystals with the right size (and shape) for further application of the products.

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2 years ago

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Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)? A.

Rudik [331]

The answer to this question would be: D. Magnesium

The number of energy levels of aluminum is 3 which was why it was put on the 3rd row. The valence of calcium is 2 which is why it was put in the 2nd column. If you look at the periodic table, the answer should be clear that it was magnesium.

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3 years ago

The following combinations are not allowed. If n and ml are correct, change the l value to create an allowable combination:

Lera25 [3.4K]

The allowable combination for the atomic orbital is n=4, l=2, $m_{l}$ =2.

<h3>What are the three quantum numbers of an atomic orbital?</h3>

Three quantum numbers specify an atomic orbital:

- The principal quantum number, n, which is a positive integer, describes the relative size of the orbital and its distance from the nucleus.

- l is the angular momentum quantum number that is related to the shape of the orbital; l is an integer from 0 to n-1 (so n limits l ),

- $\boldsymbol{m}_{l}$ is the magnetic quantum number that prescribes the three-dimensional shape of the orbital around the nucleus; $m_{l}$ values are integers from -l to =l(l limits ml)

For n = 4, l can four values: 0, 1, 2, and 3. To be consistent with $m_{l}$ =+2the l value must be higher than 1. There are two l values that are consistent with n and $m_{l}$ values: l= 2 or 3

Therefore, the allowable condition is n=4, l=2, $m_{l}$ =2

To know more about quantum numbers, visit: brainly.com/question/16979660

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2 years ago

Which concept describes the formation of four equivalent, single, covalent bonds by carbon in its compounds that resembles metha

Montano1993 [528]

Carbon is special and unique because it is able to form different compounds with a lot of elements, including itself. When it bonds with itself, this is possible because of the concept of hybridization. It is the mixing of atomic orbitals into a new hybrid orbital. In this case, methane is formed through the sp³ hybridization.

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3 years ago

What happens to the ions when the drain is turned off? please help :] ❤️

kkurt [141]

Answer:

In a long channel MOSFET, the width of the pinch-off region is assumed small relative to the length of the channel. Thus, neither the length nor the voltage across the inversion layer change beyond the pinch-off, resulting in a drain current independent of drain bias. Consequently, the drain current saturates.

Explanation:

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3 years ago