Hello!
(Missing)
<span>A) Put a coefficient of 3 on Al
B) Put a coefficient of 3 on O2
C) Put a coefficient of 2 on O2
D) Put a coefficient of 3 on Al2O3
A good first step to balance this reaction is Put a coefficient of 3 on O</span>₂.
All the other options don't balance an atom but putting a coefficient of 3 on O₂ achieves the goal of starting to balance Oxygen on both sides of the equation. The next step after that would be to put a coefficient of 2 on Al₂O₃ and there would be 6 Oxygen atoms on both sides of the equation.
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Ionization energy of atoms decrease as we move down a column on the periodic table.
Answer: Ionization energy
<u>Explanation:
</u>
The periodic table consists of elements arranged in rows (periods) and columns (groups). The arrangement of elements in a column are made based on the increasing order of atomic radii from top to bottom of column.
As the atomic radii increase in group from top to bottom, the number of electrons increase along the group lead to shielding effect. Since the count of valence electrons are same for all elements in a group, the effective nuclear charges also same.
But the increase in the atomic number lead to shielding and increase in electrons occupied in farther shells from nucleus. This leads to deduce ionisation energy when move down a group.
B. not fully absorbed by the atmosphere.
Explanation:
Visible light, which has a wavelength of between 380nm and 760nm is usually not fully absorbed by the atmosphere.
The earth's atmosphere is transparent to visible light emanating from the sun.
When visible light is radiated out from the sun, on reaching the atmospheric cover of the earth, it goes through without restraints.
- Little to no interaction occurs between the atmospheric cover of earth and visible light.
- This is why the surface is bright and receives sunlight.
- Other more energetic radiations interacts with atmosphere.
- Some of them gets cut off and some partially penetrate through.
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The main chemical compound cells use for energy is Adenosine Triphosphate (ATP)
Answer:
I think it should be Carbon.
