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prohojiy [21]
3 years ago
6

How many groups and periods are present in the periodic table?​

Chemistry
2 answers:
PilotLPTM [1.2K]3 years ago
7 0

Answer:

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements. Periods 4 and 5 have 18 elements.

Elenna [48]3 years ago
6 0

Answer:

<h2>18 groups</h2>

<u>In the periodic table, there are 7 periods and 18 groups.</u>

Explanation:

<u>#CARRY</u><u> </u><u>ON</u><u> </u><u>LEARNING</u>

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Neutralisation reactions worded formula
Liono4ka [1.6K]

Answer:

Hydrochloric acid + sodium → sodium chloride + water

NaOH +HCl → H2O and NaCl

Explanation:

salt is a neutral ionic compound. Let's see how a neutralization reaction produces both water and a salt, using as an example the reaction between solutions of hydrochloric acid and sodium hydroxide. The overall equation for this reaction is: NaOH +HCl → H2O and NaCl.

4 0
3 years ago
What is the volume of 1.50 lb (pounds) of mercury? The density of mercury is 13.546 g/mL. Use the conversion that 1 kg = 2.20 lb
Arada [10]

Answer:

50.3mL of mercury are in 1.50lb

Explanation:

Punds are an unit of mass. To convert mass to volume we must use density (13.546g/mL). Now, As you can see, density is in grams but the mass of mercury is in pounds. That means we need first, to convert pounds to grams to use density and obtain volume of mercury.

<em>Mass mercury in grams:</em>

1.50lb * (1kg / 2.20lb) = 0.682kg = 682g of mercury.

<em>Volume of mercury:</em>

682g Mercury * (1mL / 13.546g) =

<h3>50.3mL of mercury are in 1.50lb</h3>
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4 years ago
Which of the following substances would be a good electrical conductor? A. KCl(s) B. C(s) C. Al(s) D. CO2(s)
finlep [7]
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Answer:

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Explanation:

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