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3 years ago

How did Mendeleev come up with the periodic table

Chemistry

2 answers:

Ne4ueva [31]3 years ago

4 0

Answer:

Mendeleev realized that the physical and chemical properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table.

Explanation:

Elan Coil [88]3 years ago

3 0

Answer: Mendeleev realized that the physical and chemical properties of elements were related to their atomic mass in a 'periodic' way, and arranged them so that groups of elements with similar properties fell into vertical columns in his table.

Explanation:

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What determines the types of chemical reactions that an atom participates in? A. the number of electrons in the outermost electr

Dafna1 [17]

Answer:

The answer would be A. the number of electrons in the outermost electron shell.

Explanation:

These are called valence electrons which are transferred, shared, and rearranged by creating covalent bonds producing new substances.

Hope this helped! :)

8 0

3 years ago

HELP, 40 POINTS !!

Lemur [1.5K]

1. Solubility

2. Heat 100g of water to 35 degrees C. Add 37 grams of mystery salt.

3. If all the salt dissolves, it's KCl. If not, it's KNO3.

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4 years ago

12.0 of .500 M NaOH neutralized 6.0 ml of HCl solution. What was the molarity of the HCl

frozen [14]

The molarity of the HCl is 1 M when 12.0 of .500 M NaOH neutralized 6.0 ml of HCl solution.

Explanation:

Data given:

molarity of the base NaOH, Mbase =0. 5 M

volume of the base NaOH, Vbase = 12 ml

volume of the acid, Vacid = 6 ml

molarity of the acid, Macid = ?

The titration formula for acid and base is given as:

Mbase Vbase = Macid Vacid

Macid = $\frac{0. 5 X 12}{6}$

Macid = 1 M

we can see that 1 M solution of HCl was used to neutralize the basic solution of NaOH. The volume of NaOH is 12 ml and volume of HCl used is 6ml.

8 0

3 years ago

Why is burning wood a chemical change?

Nitella [24]

There are 4 things that are evidence of a chemical change.
1)Change in color
2)Change in shape (gas being let out)
3)Change in temperature
4)Change in smell

Burning wood is a chemical change because it has a change in color, and shape.

3 0

3 years ago

Help me with my work please thanks?!

masya89 [10]

Answer:

lighting a match or water and salt

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3 years ago