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lys-0071 [83]
3 years ago
14

#7) The atom on the left (pink) in the video is shown in the diagram below. From

Chemistry
1 answer:
ruslelena [56]3 years ago
6 0

Answer:

             A

Explanation:

                    Remember the number of valence electrons represent the group number. As shown in figure, there is only one electron in the valence shell. Therefore, this element belongs to group 1 elements also called as Alkali metals.

Furthermore, the number of electrons in a neutral atom equals number of protons. Hence, there are 11 protons in this element.

Also, number of protons equal atomic number therefore, the atomic number of this element is 11. And, by checking periodic table, the element having atomic number 11 is Sodium (Na).

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Which word is best used as a synonym for scientific conclusions?
Anit [1.1K]

Answer:

B

Explanation:

Not C or D becuase it is data would not show a conclusion and observations does show the conclsuion of the scientists.  Not A becuase explanation does not mean they have data to support their conclusion.  Therefore, it would be B becuase results show what was the effect of something and is often supported with data

Hope that helped :)

5 0
3 years ago
A kind of nonfoliated metamorphic rock
frozen [14]

Answer: C

Explanation:

Non-foliated metamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance.

3 0
3 years ago
What atomic or hybrid orbitals make up the bond between c2 and o in acetaldehyde, ch3cho?
SSSSS [86.1K]

Acetaldehyde is an organic compound (a compound containing C atoms) composed of a carbonyl group. On the other hand, a carbonyl group is a functional group containing C = O. The hybrid orbitals of a compound determines the number pi and s orbitals in the electronic configuration. For a single bond, there are two s orbitals. For double bonds, on the other hand, the number of s orbital bond is 1 while the number of pi bonds is 2. For triple bonds, there are three pi bonds present in the cloud.

Thus for a c = O bond, the atomic orbital configuration is sp3 containing 1 s orbital and 2 pi bonds. 

8 0
3 years ago
Read 2 more answers
When limestone (which is principally CaCO3) is heated, carbon dioxide and quick- lime (Cao) are produced by the reaction CaCO3(s
anyanavicka [17]

Answer:

B.They show that the speaker’s memories come from various senses and seasons.

B.They show that the speaker’s memories come from various senses and seasons.

Explanation:

7 0
3 years ago
1. In order to make 1 salad it requires 1 head of lettuce, two tomatoes and three carrots. What would be the coefficients for th
pogonyaev

Answer:

3 salad = 3 lettuce + 6 tomatoes + 9 three carrots

Coefficients: 3, 6, 9

Explanation:

1 salad = 1 lettuce + 2 tomatoes + 3 three carrots

<em>Multiply all the coefficients of 1 salad by 3:</em>

3(1 salad) = 3(1 lettuce + 2 tomatoes + 3 three carrots)

<em>Expand the equation:</em>

3 salad = 3 lettuce + 6 tomatoes + 9 three carrots

5 0
3 years ago
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