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How many elements are discovered so far? Name those elements?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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A total of 118 elements have been discovered so far. Their names are given below:Name of Elements( arranged according to their discovery.)1.Copper2.Lead3.Gold4.Silver5.Iron6.Carbon7.Tin8.Sulphur9.Mercury10.Zinc11.Arsenic12.Antimony13.Bismuth14.Phosphorus15.Cobalt16.Platinum17.Nickel18.Magnesium19.Hydrogen20.Oxygen21.Nitrogen22.Barium23.Chlorine24.Manganese25.Molybdenum26.Tungsten27.Tellurium28.Strontium29.Zirconium30.Uranium31.Titanium32.Yttrium33.Chromium34.Beryllium35.Vanadium36.Niobium37.Tantalum38.Palladium39.Cerium40.Osmium41.Iridium42.Rhodium43.Potassium44.Sodium45.Calcium46.Boron47.Fluorine48.Iodine49.Lithium50.Cadmium51.Selenium52.Silicon53.Aluminium54.Bromine55.Thorium56.Lanthanum57.Erbium58.Terbium59.Ruthenium60.Caesium61.Rubidium62.Thallium63.Indium64.Helium65.Gallium66.Ytterbium67.Holmium68.Thulium69.Scandium70.Samarium71.Gadolinium72.Praseodymium73.Neodymium74.Germanium75.Dysprosium76.Argon77.Europium78.Krypton79.Neon80.Xenon81.Polonium82.Radium83.Radon84.Actinium85.Lutetium86.Rhenium87.Protactinium88.Hafnium89.Technetium90.Francium91.Neptunium92.Astatine93.Plutonium94.Promethium95.Curium96.Americium97.Berkelium98.Californium99.Einsteinium100.Fermium101.Mendelevium102.Lawrencium103.Nobelium104.Rutherfordium105.Dubnium106.Seaborgium107.Bohrium108.Meitnerium109.Hassium110.Darmstadtium111.Roentgenium112.Copernicium113.Flerovium114.Livermorium115.Oganesson116.Moscovium117.Nihonium118.TennessineRead More

Why the scale is used for measurements?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Reason for using the scale to measure :The standard meter bar in Paris was used as the criterion against which all other rulers were determined to be one meter long.Therefore, all the scales(rulers) that are made are measured against a certain scale for the accuracy.

In integer, when we have the same numbers and different sign then what we can do [+/-]?

Tutorialspoint

Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Rules of integers for addition and subtraction 1) If the two numbers have a different sign like positive and negative then subtract the two numbers and give the sign of the bigger number.Eg: $17 - 8 = + 9;   -12 + 5 = -7$  2) If the two numbers have ... Read More

Explain the greatest and the smallest comparing numbers.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Greatest And The Smallest ComparisonFor comparing numbers we follow the rules given below.Rule I: We know that a number with more digits is always greater than the number with less number of digits.Rule II: When the two numbers have the same number of digits, we start comparing the digits from ... Read More

How warm live in soil? Does the air come under the soil or not?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Worms like Earthworm lives in soil and feed on dead and decayed plant remains and litter. When they move in the soil they create spaces or gaps which are filled with air.

Mention the uses of practical geometry with examples.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Uses of Practical Geometry :Practical Geometry enables students to:  Identify geometric figures Classify geometric figures and To apply the geometric properties to practical situations. eg. height of staircase and height of each stairs, area of a ground, etc.

In Class 7, 48 students passed out of 70 students. What is the percentage of students passed?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Given: Total number of students = 70Number of students who passed out = 48 To find: Percentage of students passed Solution: Percentage of students who passed =$\frac{ 48}{70} \times 100 $= 68.57%Therefore, the percentage of students who passed is 68.57%

Solve the following:$ 7 x-(2 x+5)=3 x-2$

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Given: $ 7 x-(2 x+5)=3 x-2$To do:  Solve for $x$.Solution:$7x -(2x + 5) = 3x -2$ $7x - 2x -5 = 3x -2$ Let us transpose all $x$ terms to left sides and all numbers to right side. $7x - 2x  - 3x  = -2 + 5$ $2x = 3$ ... Read More

Find the value of:(67)+6+56-1.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Given: (67)+6+56-1To find: We have to find the value of (67)+6+56-1.Solution: (67)+6+56-1= 73 + 56 - 1  [as 67 + 6 = 73] = 129 - 1 [ as 73 + 56 = 129] = 128 [as 129 - 1 = 128]

What is the meaning of Material?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:25

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Material is any substance or mixture of substances that occupy space, has a volume and has a mass. We need to group materials for our convenience and to study their properties. These properties are:• Appearance• Solubility• Hardness• Float/sink• Transparent/opaqueBelow are some properties of materials• Appearance:  The look, feel, texture in ... Read More

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