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3 years ago

Elements found to the left of the metalloids on the periodic table display which properties? Select all that apply.

2 answers:

8 0

Metals tend to be good conductors, they tend to form cations, They are lustrous, Can't be broken easily, High density, ductile, tend to gain valence electrons and so on.

Katyanochek1 [597]3 years ago

4 0

They are solid

They are shiny, good conductors of electricity and heat.

They are ductile

They are malleable

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One atomic model describes electrons moving in clouds around the nucleus.

bixtya [17]

Answer: D. It is the currently accepted atomic model.

Explanation:

It is the mordern atomic model, also known as the Electron Cloud Model. Indicating that the nucleus of an atom is surrounded by a cloud of electrons.

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3 years ago

What does the process of natural selection involve

Lorico [155]

Answer:

Only the organisms best adapted to their environment tend to survive and transmit their genetic characters in increasing numbers to succeeding generations while those less adapted tend to be eliminated.

Explanation:

According to Darwin's Theory of Evolution.

Hope this helped.

5 0

3 years ago

Nitrogen dioxide is produced by combustion in an automobile engine. For the following reaction, 0.377 moles of nitrogen monoxide

Contact [7]

Answer:

The amount of NO₂ that can be produced 8.533 g

Explanation:

According to question

2 NO(g) + O₂(g) → 2 NO₂(g)

Given

Moles of nitrogen monoxide = 0.377

Moles of oxygen = 0.278

$'For NO'=\frac{Mole}{Stoichiometry}=\frac{0.377}{2} =0.1855\\'For O_{2} '=\frac{0.278}{1}= 0.278\\$

Since 'NO' is the limiting reagent according to this ratio.

According to equation

2 moles NO reacts to form 2 moles NO₂

So, 0.1855 moles NO give = 0.1855 moles of NO₂

Mass of 1 mole NO₂ = 46 g/mole

Mass of 0.1855 moles = 46 x 0.1855 = 8.533 g

5 0

4 years ago

In which group of teh modern periodic table are there very reactive metals and very reactive non metals?

Rufina [12.5K]

Metals :-

Group 1A - Alkali metals ( highly reactive metals)

Non-metals :-

Group 17 - Halogens ( highly reactive non-metals )

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3 years ago

A student shines a flashlight on a mirror.

irga5000 [103]

Answer:

Explanation:

mirrors reflect light

7 0

3 years ago

Read 2 more answers