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abruzzese [7]
4 years ago
15

For elements 1-20, we can use the periodic table to predict.

Chemistry
2 answers:
mezya [45]4 years ago
4 0

Answer:

B

Explanation:

because a periodic table shows the arrangement of element according to their atomic number and their valence neither

isotopes nor colour

Elina [12.6K]4 years ago
3 0

Answer:

B.

Explanation:

We can predict the number of valence electrons  by which group of the Periodic table an element resides.

For example Lithium is in group 1  and has 1 valency electron.

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Suppose an enzyme and its substrate obey the lock and key model of enzyme catalysis. Which of the following would be true of the
Maurinko [17]

Answer:

only one substrate could be converted to product by the enzyme

Explanation:

If an enzyme obeys the lock and key model, it then follows that the design of the enzyme is unique to a particular substrate.

Just as only the correct key can effectively fit into a lock, only the appropriate substrate whose design matches that of the enzyme can fit into the enzyme.

Owing to the lock and key model of enzyme activity, only one enzyme could interact with a substrate to yield particular product.

4 0
3 years ago
What was the open-range system ​
Nesterboy [21]

Answer: In the Western United States and Canada, open range is rangeland where cattle roam freely regardless of land ownership. ... Land in open range that is designated as part of a "herd district" reverses liabilities, requiring an animal's owner to fence it in or otherwise keep it on the person's own property.

Explanation: Mark me as brainliest

5 0
4 years ago
How many electrons would it take to equal the mass of a helium nucleus?
Agata [3.3K]
Since the mass of of the helium nucleus is approx. 4.00 amu
6 0
4 years ago
3. Which element has the ground state electronic configuration, 1s22s22p63s23p645' ?
Taya2010 [7]

Answer:

Explanation:simple 1s22s22p63s23p1

short form [Ne] 3s23p1

orbital energy diagram

5 0
3 years ago
Examine the statement and balanced equation.
Svetach [21]

Answer:

The answer to your question is:   1.28 x 10 ¹⁵ g of Fe₂(SO₄)₃

Explanation:

Single replacement reaction:

                                  2Fe   +    3H₂SO₄    →    Fe₂(SO₄)₃   +   3H₂

M Fe = 55.8 g/mol

M H₂SO₄ = 98.1 g/mol

M Fe₂(SO₄)₃ = 399.9 g/mol

M H₂ = 2.0 g/mol

Fe₂(SO₄)₃ = 3.21 x 10¹² mol

Fe₂(SO₄)₃ =  ? g

                          1 mol of Fe₂(SO₄)₃ -----------------  399.9 g/mol of Fe₂(SO₄)₃

                          3.21 x 10¹² mol Fe₂(SO₄)₃ --------    x

   

                         x = (3.21 x 10¹² x 399.9 ) / 1

                         x = 1.28 x 10 ¹⁵ g of Fe₂(SO₄)₃

8 0
3 years ago
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