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fiasKO [112]
3 years ago
10

WILL GIVE THANKS,STARTS AND BRANLIEST!!!!! PLEASE COME LOOK! SHARE YOUR SMARTNESS!!!! PLSSSSS AT LEAST COME TAKE A LOOK! ANSWER

IF 100% SURE.
4. What is the amount of valence electrons in an atom equivalent to?
A) The amount of protons an atom has
B) The group the atom is located
C) The period the atom is located
D) The amount of electrons an atom has


6. How many sodium (Na) and oxygen (O) atoms are needed to form the ionic compound sodium oxide?

A) There needs to be 1 Na atom and 2 O atoms to form Na2O
B) There needs to be 1 Na atom and 1 O atom to form Na2O
C) There needs to be 2 Na atoms and 1O atom to form Na2O
D) There needs to be 2 Na atoms and 2O atoms to form Na2O
Chemistry
2 answers:
madreJ [45]3 years ago
6 0

Answer:

B) The group the atom is located

C) There needs to be 2 Na atoms and 1O atom to form Na2O

Lorico [155]3 years ago
3 0

Answer:

4. A

5. I don't see the correct answer, but 2 sodium and one oxygen.

Explanation:

4., Because the amount of electrons needs to be equal to the number of protons to balance out charges.

5. You can find it on the web.

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babunello [35]

Group C : 32.1°C , 31.9°C, 31.8°C makes the most precise measurements of the object's temperature.

Precision :The degree of similarity between study results of the experiment if they were performed today under comparable conditions.

If repeated measurements yield similar results, the measurement is considered precise (or repeated surveys).

It means how closely all the results are related .

Therefore, there should be less difference between the measurements of all the results.

In option (a) , there is a difference of 1° in all the results.

In option (b) , there is a difference of approximately 1.5° in all the results.

In option (c), there is only 0.2° difference in all the results.

In option (d) , there is a difference of 3° in all the results.

Therefore, All the option of group (c) are closely related.

Hence, Group (c) 32.1°C, 31.9°C, 31.8°C makes the most precise

measurements of the object's temperature.

Learn more about Precision & Accuracy here brainly.com/question/5792909

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