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Lady bird [3.3K]
3 years ago
14

Which trends appear as the elements in Period 3 are considered from left to right?

Chemistry
1 answer:
andreev551 [17]3 years ago
8 0

Answer:

Metallic character decreases, and electronegativity increases.

Explanation:

Hello!

In this case, according to the organization of the periodic table, we can see that from left to right, the electronegativity increases as nonmetals are able to attract electrons more easily than metals.

Moreover, in contrast to the previous periodic trend, the metallic character decreases from left to right because the elements tend to decrease the capacity to lose electrons and consequently start attracting them.

Thus, the answer would be: "Metallic character decreases, and electronegativity increases".

Best regards!

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Julio measured the weight of a grain of sand and found it to be 3.5 times 10 Superscript negative 10 kg. He also measured the we
Anvisha [2.4K]

The total weight of both objects : 7.035 x 10⁻⁸ kg

<h3>Further explanation</h3>

Given

The weight of a grain of sand : 3.5 x 10⁻¹⁰ kg

The weight of one hair from his eyebrow : 7 x 10⁻⁸ kg

Required

The total weight of both objects

Solution

Scientific Notation consists of 2 parts  

1. the first part: the first digit followed by the decimal point  

2. The second part: the power of 10 (the exponents).which shows the number of digits after the decimal point  

To add/subtract, the exponents must be the same and then add/subtract the coefficient

  • convert the largest exponent  (7 x 10⁻⁸)

7 x 10⁻⁸ = 700 x 10⁻¹⁰

  • add the coefficients  

\tt =(3.5+700)\times 10^{-10}\\\\=703.5\times 10^{-10}\\\\=7.035\times 10^{-8}

 

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