Why is the metric (SI) system called a decimal system of measurement
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The metric system is the oldest name for the international system of units. SI unit or the international systems of units are based on seven basic units; the meter, kilogram, second, ampere, Kelvin, candela and mole. All of these basic units are divided into multiples by a power of ten. For example in meters, 1 meter is equal to: 1000 millimeter, 100 centimeter, 10 decimeter, 0.1 decameter, 0.01 hectometer, 0.001 kilometer and so on and so forth.
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Element which has both metallic and non-metallic properties is silicon as it is a metalloid.
What are metalloids?
Metalloids are defined as the elements which possess properties of both metals as well as non-metals.These elements are present only in the p-block of the periodic table.
In the p-block of the periodic table, these are the elements which separate the metals from the non metals by forming a zig-zag line between them.
These elements have 4 electrons in their valence shell which indicates that they can neither loose nor accept electrons rather share them between the 2 atoms.
As the elements are present between metals and non-metals they resemble both categories of elements in terms of their properties.They usually possess metallic appearances but are brittle.
Chemically, the behave as non-metals and have a characteristic property of forming alloys.They can form amphoteric or weakly acidic oxides.
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The name of the compound given in the question is nitrogen trifluoride.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Answer:
Nitrogen Trifluoride
Explanation:
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Answer : The number of moles of hydrogen gas needed are, 0.253 mole
Explanation : Given,
Moles of water = 0.253 mole
Now we have to calculate the moles of hydrogen gas.
The given balanced chemical reaction is,
From the balanced reaction we conclude that,
As, 2 moles of water obtained from 2 moles of hydrogen gas
So, 0.253 moles of water obtained from of hydrogen gas
Therefore, the number of moles of hydrogen gas needed are, 0.253 mole
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Answer:idk what they cpuld do but we can say this is the right answer :))))
Explanation:
I need PoInTs
You could write about anything. Some examples you might include are the following:
- Heat the metal until it melts (physical change).
- Attempt to react the metal with oxygen (chemical change).
- Stretch the metal into a wire (physical change).
- Attempt to react the metal with acid (chemical change).