Answer:
Fossils: 3.5 billion. Rocks: 4.28 billion
they were found during Haden Eon
Explanation:
Density
Mass
Gravity
Answer:
Both are right
Explanation:
A constant heat must be supplied for several minutes to soldering gun to overcome the melting point of solder. A butane torch is a type of soldering device powered (energised) by the burning of butane gas to melt and solder common metals
germanium has 32 protons in its nucleus
b. period number.
c. number of protons.
d. number of valence electrons.
The chemical properties of an element are largely determined by the number of valence electrons. Thus option D is correct.
Valence electrons an atom is defined as the number of electron which lose or gain the nearest noble gas or inert gas electronic configuration.
The valence electrons are the main part of chemical reactions as these contain more energy as compared to the electrons present in inner orbits.
The number of valence electrons present helps to determine the chemical properties of element like valence or valency, bonds with other elements.
It also show a picture of the mechanism of bond formation of an atom, the number of unpaired electrons and how many atoms can take part.
Learn more about valence electron, here:
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a. Polystyrene
b. Nylon
c. Sucrose
d. PVC
The answer is: sucrose.
Polystyrene, nylon and PVC are examples of a polymer.
Sucrose or table sugar (C₁₂O₂₂O₁₁) composed of two monosaccharides. This monosaccharides glucose and fructose are linked with an ether bond between C1 on the glucosyl subunit and C2 on the fructosyl unit.
Polystyrene is a synthetic aromatic hydrocarbon polymer made from the monomer styrene.
Styrene (ethenylbenzene) is an organic compound with the chemical formula C₆H₅CH=CH₂. It is a colorless oily liquid.
Plastic PVC is organic polymers of high molecular mass derived from petrochemicals.
Among Polystyrene, Nylon, PVC, and Sucrose, the compound that is not a polymer is Sucrose because it is a smaller, simple molecule comprised of two monosaccharides and does not have a long chain of repeating units.
In considering the options provided, Polystyrene, Nylon, and PVC are all polymers. Polymers are made up of many similar units or monomers, and they typically have high molecular weights. Polystyrene, Nylon, and PVC, which stands for Polyvinyl Chloride, are large molecules made up of repeating subunits. The only one which does not fit this particular basis is Sucrose.
Sucrose, commonly known as table sugar, is a small, simple molecule. It is a disaccharide, meaning it is composed of two monosaccharides, glucose and fructose. Therefore, it is not a polymer because it does not contain a long chain of repeating units.
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Answer:
true
Explanation:
Answer:
True the wind causes waves in the ocean
Explanation: