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inysia [295]
3 years ago
8

How many elements are found in the third period. A.2 B.18 C.8 D.32​

Chemistry
2 answers:
Lunna [17]3 years ago
4 0

Answer:

C. 8

Explanation:

Check chemistry textbook

mamaluj [8]3 years ago
3 0

Answer:

8

Explanation:

u can find it on ur chemistry book

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Please please help me please please help please please help me please please help please please
Tatiana [17]

Answer:

AU9NJ-BLVHV-TCLJS-54YTB

6 0
2 years ago
competed in a track meet and you run the 1500m race in 403 s. what was your average speed in miles per hour
laila [671]

Answer:

403 Seconds in Minutes is about 6 minutes.

Explanation:

Now, because I don't know if you're labeling your 1500 as meters or miles, I'm assuming it's miles.

I'm going to take a gander at your question.

Since you're technically going so fast for some odd reason.

Your answer should most definitely be 403 MPH

6 0
3 years ago
Hi how are you today well have a great rest of your day
amid [387]

Answer:

I'm well and same to you

Explanation:

6 0
2 years ago
Read 2 more answers
A sample of carbon of mass 250 mg from wood found in a tomb underwent 2480 carbon- 14 disintegrations in 20 h. Estimate the time
Ksenya-84 [330]

Explanation:

Let the age to be found in years is y.

Hence,       (2480 disintegrations) \times \frac{\frac{1.0g}{0.250g}}{1.84 \times 10^{4} disintegrations}

                        = (\frac{1}{2})^{\frac{y}{5730yr}}

Solve for y as follows.

                    0.53913 = (\frac{1}{2})^{\frac{y}{5730yr}}

Now, taking log on both the sides as follows

               log 0.53913 = (\frac{z}{5730}) log \frac{1}{2}


               \frac{log 0.53913}{log (1/2)} = \frac{z}{5730}

                       z = \frac{5730 \times log 0.53913}{log (1/2)}

                         = 5107 years

Thus, we can conclude that the time since death is 5107 years.

5 0
3 years ago
In the reaction 2Na + Cl2 → 2NaCl, the products are
Lisa [10]
During a reaction, there are reactants and products. Reactants are the elements that are being added. Products are the result of the reactants.

2Na + Cl2 are the reactants.

2NaCl is the Product.

I hope this helps!
8 0
3 years ago
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