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spin [16.1K]
3 years ago
14

What type of elements are in s-block

Chemistry
1 answer:
aliina [53]3 years ago
4 0
There are 2 different types of elements is s-block.
1. Alkali earths metals.

2. Alkaline earths metals.



2 Exceptions are Hydrogen and helium gas.

Examples: Sodium, potassium, francium, beryllium, magnesium... etc
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What is acid precipitation?
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Explanation:

precipitation like snow rain with increased acid is know as acid precipitation

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Four atoms and/or ions are sketched below in accordance with their relative atomic and/or ionic radii. Which of the following se
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Hence the correct option is an option (b) Sr4, Cl,Br−,Na+.

Explanation:    

Bromine and chlorine belong to an equivalent group. As we go down the group the dimensions increases which too there's a charge on the bromine atom. therefore the size of the Br- is going to be larger in comparison to the chlorine atom.

Sr atom is within the second group, and also it's below the above-mentioned atoms.so Sr is going to be the larger one among all the atoms.

Sodium and chlorine belong to an equivalent period .size decrease from left to right. but due to the charge on sodium its size decreases and there's an opportunity that Na+ size could be adequate for Cl.      

Here we finally assume that two atoms are of an equivalent size (Na+ and Cl) which are less in size compared to the opposite two(Sr and Br-) during which one is greater (Sr)and the opposite is smaller(Br-).

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2 years ago
An element X exists as three naturally occurring isotopes. If all isotopes have the same atomic number, what would be the differ
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the amount of neutrons would be the difference in the three isotopes

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Freshwater is distributed in both time and space
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Convert 16.8 L of nitrogen monoxide gas at STP to grams .
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Answer:

See explanation

Explanation:

1 mole of a gas occupies 22.4 L

x moles occupies 16.8 L

x = 1 mole *  16.8 L/22.4 L

x = 0.75 moles

number of moles = mass/molar mass

mass =  number of moles  * molar mass

mass =  0.75 moles * 30.01 g/mol = 22.5075 g = 2.25 * 10^1 g

the coefficient of the scientific notation answer = 2.25

the exponent of the scientific notation answer = 1

significant figures are there in the answer = 6

the right most significant figure in the answer = 3

2.

number of moles = 12.5g/38g/mol = 0.3289 moles

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0.3289 moles occupies 0.3289 moles * 22.4 L/1 mole

= 7.36736 L = 7.36736 * 10^0 L= 7.37 * 10^0 L

the coefficient of the scientific notation answer =7.37

the exponent of the scientific notation answer = 0

significant figures are there in the answer = 6

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8 0
3 years ago
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