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3 years ago

Before the Internet, it was easier for small businesses to do business on a global scale. Choose the answer.

Chemistry

2 answers:

Umnica [9.8K]3 years ago

8 0

I think it’s false ......

wlad13 [49]3 years ago

3 0

Answer:

B. False

Explanation:

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Calculate the energy of a quantum of radiant energy with a frequency of 5.00x1011/s

Aloiza [94]

5.00 x 1011/s = 5.05500kilohertz

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3 years ago

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AleksAgata [21]

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3 years ago

All atoms of an element have the same number of ________. electrons neutrons protons protons plus neutrons

Cloud [144]

Answer:

protons

Explanation:

An element, by definition, always has the same number of protons. Sodium, element 11, has 11 protons. Anything with 11 protons is a sodium atom, regardless of the number of neutrons, electrons, or politicians.

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2 years ago

Group the following electron configurations in pairs that would represent similar chemical properties at their atoms;

marishachu [46]

Answer: Pairs are: (a) and (d), (b) and (f), (c) and (e)

Explanation:

In a periodic table, elements are arranged in 18 vertical columns known as groups and 7 horizontal rows known as periods.

Elements arranged in a group show similar chemical properties because of the presence of same number of valence electrons.

Valence electrons are defined as the electrons which are present in the outermost shell of an atom. Outermost shell has the highest value of 'n' that is principal quantum number.

For the given options:

For a:

The given electronic configuration is: $1s^22s^22p^63s^2$

The number of valence electrons in the given configuration are 2

For b:

The given electronic configuration is: $1s^22s^22p^63s^3$

The number of valence electrons in the given configuration are [2 + 3] = 5

For c:

The given electronic configuration is: $1s^22s^22p^63s^23p^64s^23d^{10}4p^6$

The number of valence electrons in the given configuration are [2 + 6] = 8

For d:

The given electronic configuration is: $1s^22s^2$

The number of valence electrons in the given configuration are 2

For e:

The given electronic configuration is: $1s^22s^22p^6$

The number of valence electrons in the given configuration are [2 + 6] = 8

For f:

The given electronic configuration is: $1s^22s^22p^63s^23p^3$

The number of valence electrons in the given configuration are [2 + 3] = 5

Electronic configuration of (a) and (d) will form a pair, (b) and (f) will form a pair, (c) and (e) will form a pair and will have similar chemical properties.

Hence, the pairs are: (a) and (d), (b) and (f), (c) and (e)

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3 years ago

The pH scale is called the logarithmic scale what does this mean?

Ratling [72]

A logarithmic scale is a nonlinear scale used when there is a large range of quantities

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4 years ago