Which general trend in period 2 on the Periodic table as the elements are considered in order of increasing atomic number? 1)increasing atomic radius
2.) decreasing electronegativity
3.) increasing 1st ionization energy
4.) decreasing atomic mass
Answers
As the atomic number increase in the 2nd period, the first ionization energy also increases. Therefore, option (3) is correct.
What is the ionization energy?
The ionization energy can be described as the minimum amount of energy that is absorbed by an electron to come out of the influence of the nucleus of a gaseousatom.
In general, the atomic number of an atom increases as we move from left to right in a period on the modern periodic table. While moving from left to right, there is an increase in the effective nuclear charge while the electron enters the same electron shell.
The atomic radius of an atom in the period decreases in the order of increasing atomic number. As the effective nuclear charge is increasing large amount of energy is required to knock out the electron from an atom. Therefore, the first ionization energy also increases as the atomicnumber increase in the 2nd period.
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Density is defined as the ratio of mass to volume of a substance.
The density of water is generally known to be 1.0 g/mL. Substances that are less dense than water will float on water while substances that are denser than water will sink in water.
We have to calculate the density of the block material in units of g/ml.
Volume of the block = = 19.66 mL
Mass of the block = 350 lb = 158757 g
Density of the block =
Density of block =
= 8075.13 g/mL
Hence the block material will sink in water.
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density of water is approximately 1.0 g/mL
block of material
volume of 1.2 x 10^4 in^3
and weighing 350 lb
Required:
Which will float
Solution:
D = M/V where D is density, M is mass and V is volume
convert 1.2 x 10^4 in^3 into mL
1.2 x 10^4 in^3 (16.39 mL/ 1 in3) = 196,980 mL
convert 350 lb into grams
350 lb (454 grams/1 lb) = 158,900 grams
D = M/V = 158,900 grams/ 196,980 mL
D = 0.807 g/mL
The block will float in water because it is less dense than water
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Final answer:
Starch is easily digested by humans due to the presence of enzymes breaking its α-glucose bonds, while humans lack the enzymes to break the β-glucose bonds in cellulose, rendering it indigestible but essential as dietary fiber.
Explanation:
Starch and cellulose are both polysaccharides produced by plants. Their structural differences, however, determine how they can be digested by animals. Starch is made up of α-glucose molecules, which are joined together by 1-4 and 1-6 glycosidic bonds, forming a helical structure. The human digestive system has enzymes like amylase that can break these bonds, enabling the digestion of starch.
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Answers
Answer:
true
Explanation:
John Smith
B)
John Winthrop
C)
Thomas Dale
D)
William Bradford
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Answer: John winthrop
Explanation:
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When looking up at the clouds, you can usually make out different shapes and figures with cumulus clouds.
Cumulus low-level clouds. They are the puffy, white, cotton-top clouds that look so soft.