B. -1.0 amu
C. 0.0005 amu
the answer is lavoiser
Antoine-Laurent de Lavoisier, a French chemist, organized elements into four groups based on their properties: gases, nonmetals, metals, and earths. This was a monumental contribution to the field of Chemistry.
The person you're referring to who organized elements into four groups based on their properties is the French chemist Antoine-Laurent de Lavoisier. Lavoisier is commonly known as the 'Father of Modern Chemistry' and his work contributed significantly to the development of this field. In the late 18th century, he sorted 33 elements into four categories: gases, nonmetals, metals, and earths, by recognizing their similar properties. This was a significant step at the time, further paving the way for the modern periodic table.
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B. It converts glucose into energy.
C. It controls the way your body uses calcium.
D. It effectively rehydrates the system
Answer:
C.
Explanation:
Vitamin D is a molecule that is essential in the transport of the Calcium to the bones, it can be obtained from direct contact with the sun or can be obtained directly from the diet. Besides transporting the Calcium to the bones, also participates in regulation of calcium and fosfate in the kidneys and intestine promoting the calcium reabsortion at renal level and calcium absortion at intestinal level. Also modulates the inmune system, promoting the maturation of monocytes to macrophages, improving the inmune response.
b)all have ions with a 1+ charge
c)gain electrons when they form ions
d)lose electrons when they form ions
Isotopic Natural
Mass Abundance
Number %
1 39 78.8
2 40 18.1
3 41 3.1
what is the atomic weight
The atomic weight of a hypothetical element with isotopes of masses 39, 40, and 41 and natural abundances of 78.8%, 18.1%, and 3.1% respectively, is approximately 39.243 atomic mass units (amu).
To calculate the atomic weight of an element from its isotopes' masses and abundances, use the formula: atomic weight = (mass1 x abundance1) + (mass2 x abundance2) + ... (massn x abundancen), where the masses are the isotopes' masses and the abundances are given as proportions (i.e., percentages divided by 100).
Using the values from your question, the calculation would be as follows:
Atomic weight = (39 x 0.788) + (40 x 0.181) + (41 x 0.031) = 30.732 + 7.24 + 1.271 = 39.243. So, the atomic weight of the hypothetical element is approximately 39.243 atomic mass units (amu).
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b. silicon
c. oxygen
d. hydrogen
Answer:
Silicon and oxygen
Explanation:
All silicate minerals must contain silicon and oxygen even though the name might mislead one into thinking it is only just silicon. Actually the suffix -ate in chemistry is used when an element is combined with oxygen. Which is why the carbonate ion has carbon and oxygen, the nitrate ion has nitrogen and oxygenThis repeats itself in the sulphate ion, phosphate ion, chromate ion, manganate ion etc.