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2 years ago

Look at the screenshot ;)

Chemistry

1 answer:

SashulF [63]2 years ago

6 0

This is not the best way to organize a periodic table because two elements might have similar atomic mass.

<h3>What is periodic table?</h3>

Periodic table is a chart in which arrangement of chemical elements are done.

In the early periodic table elements are arranged on the basis of their atomic masses, while after sometime Moseley arranged the periodic table on the basis of atomic number as he proposed that properties of an element is justified on the basis of number if electrons.

And mass of two substances may be same so it is difficult to differentiate between them.

Hence, two elements might have similar atomic mass.

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Draw the Lewis structure (including all lone pair electrons) for one isomer of the molecular formula C3H8O.

Andreyy89

Answer:

Here's how I would do it.

Explanation:

A Lewis structure shows the valence electrons surrounding the atoms.

1. Identify the central atoms

The central atoms are the least electronegative atoms (C).

I chose as my central atoms a chain of four C atoms: C-C-C-C

I stuck the most electronegative atom (O) at the end of the chain:

C-C-C-C-O

2. Complete the structure

The hydrogen atoms must be terminal. Add enough to give every atom an octet.

You should get a structure like the one below

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3 years ago

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16: solar energy, 17: glucose, 18: heat, 19: atp

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3 years ago

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2. Perception:

sineoko [7]

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Someone's perception can be all of these things. the way one person sees something is different than the way someone standing right beside them sees it.

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4 years ago

Kylee (leer) muchos libros<br>leemos<br>lee<br>leo

bearhunter [10]

Lee? The verb should be in the el/Ella/usted form

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3 years ago

What element is this? How do you know? (Page 495 and Periodic Table Pages 500-501)

vfiekz [6]

Helium (He)

Explanation:

In the picture we see the following elementary particles:

2 electrons - the two spheres with negative charge which orbit around the nucleus

2 protons - the two spheres with positive charge in the nucleus

2 neutrons - the two spheres with no charge in the nucleus

The element will be Helium (He), because it have the atomic number 2 and the mass number 4, which means it contains 2 electrons, 2 protons and 2 neutrons.

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