- Which is the oldest element?
- What is period in periodic table?
- What element is in Period 2 Group 14?
- Which is the longest group in periodic table?
- What is the color of oxygen?
- Where do they get helium?
- What is Period 1 on the periodic table?
- Why does the 3rd period have 8 elements?
- Which elements are in the same period?
- What is the period of he?
- Why is oxygen in period 2?
- What is the element in Group 10 and Period 5?
- What is the trend in melting point for Period 2?
- How was oxygen named?
- What is the period number of oxygen?
- Why does Period 1 only have 2 elements?
- Who found helium?
- What does the group and period tell you?
- What Colour is helium?
- What does the group number tell you?
- Why is 7th period incomplete?
- Can you make helium?
- What are 5 interesting facts about helium?
- What is the period number the same as?
- What is period and group in periodic table?
- What are 3 uses for oxygen?
- How much money does helium cost?
Which is the oldest element?
PhosphorusThe oldest chemical element is Phosphorus and the newest element is Hassium.
Please note that the elements do not show their natural relation towards each other as in the Periodic system..
What is period in periodic table?
The horizontal rows of the periodic table are called periods. Each period corresponds to the successive occupation of the orbitals in a valence shell of the atom, with the long periods corresponding to the occupation of the orbitals of a d subshell.
What element is in Period 2 Group 14?
CarbonSALIENT FEATURES OF GROUP 14 (CARBON FAMILY) ELEMENTSPeriodElementAtomic number (Z)2Carbon63Silicon144Germanium325Tin501 more row
Which is the longest group in periodic table?
Modern periodic table is divided into 7 periods and 18 groups. Group 1(H, Li, Na, K, Rb, Cs, Fr) is the longest group in the periodic table. The first group is called the alkali metals group.
What is the color of oxygen?
redTypical assignmentshydrogen (H)whitenitrogen (N)blueoxygen (O)redfluorine (F), chlorine (Cl)greenbromine (Br)dark red11 more rows
Where do they get helium?
Nearly all of our helium is extracted from natural gas, a byproduct of radioactive decay of uranium and thorium. Much of the extraction in the United States and the world comes from underground gas fields between Amarillo, Texas, and Hugoton, Kansas, where a very high concentration, up to 2%, can be found.
What is Period 1 on the periodic table?
A period 1 element is an element in the first period (row) of the periodic table. … It means that elements in the same group have similar properties. The first period has less elements than any other periods in the periodic table. There are only two elements in the first period: hydrogen and helium.
Why does the 3rd period have 8 elements?
According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.
Which elements are in the same period?
Elements that are in the same period have chemical properties that are not all that similar. Consider the first two members of period 3: sodium (Na) and magnesium (Mg). In reactions, they both tend to lose electrons (after all, they are metals), but sodium loses one electron, while magnesium loses two.
What is the period of he?
Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.
Why is oxygen in period 2?
The second period contains the elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon. … Period 2 elements obey the octet rule in that they need eight electrons to complete their valence shell, where at most eight electrons can be accommodated: two in the 2s orbital and six in the 2p subshell.
What is the element in Group 10 and Period 5?
Group 10, numbered by current IUPAC style, is the group of chemical elements in the periodic table that consists of nickel (Ni), palladium (Pd), platinum (Pt), and perhaps also the chemically uncharacterized darmstadtium (Ds). All are d-block transition metals.
What is the trend in melting point for Period 2?
The melting points and boiling points tend to peak in the middle of Periods 2 and 3 (Groups 3/13 and 4/14) and the lowest values at the end of the period – the Noble Gases.
How was oxygen named?
The name oxygen comes from the Greek word “oxygenes” meaning “acid producer”. It was called this because early chemists thought that oxygen was necessary for all acids.
What is the period number of oxygen?
2Fact boxGroup16Melting pointPeriod2Boiling pointBlockpDensity (g cm−3)Atomic number8Relative atomic massState at 20°CGasKey isotopes2 more rows
Why does Period 1 only have 2 elements?
There are only two elements in the first period: hydrogen and helium. … This is because in quantum physics, this period fills up the 1s orbital. Period 1 elements follows the duet rule, they only need two electrons to complete their valence shell. These elements can only hold two electrons, both in the 1s orbital.
Who found helium?
Pierre JanssenPer Teodor CleveNorman LockyerHelium/Discoverers
What does the group and period tell you?
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
What Colour is helium?
ColorGasColorHeliumWhite to orange; under some conditions may be gray, blue, or green-blue.NeonRed-orangeArgonViolet to pale lavender blueKryptonGray, off-white to green. At high peak currents, bright blue-white.8 more rows
What does the group number tell you?
The group number in the periodic table represents number of valence electrons of the elements in a certain group. For example, all the elements in Group−1 have 1 electron in their outer most shell.
Why is 7th period incomplete?
7th period is considered incomplete because it consists of elements which have not been studied properly yet. … Thus, we can’t give them a permanent recognition as all the elements in the periodic table have many properties and similarities to follow.
Can you make helium?
Helium is generated underground by the radioactive decay of heavy elements such as uranium and thorium. … Helium can also be produced by liquefying air and separating the component gases. The production costs for this method are high, and the amount of helium contained in air is very low.
What are 5 interesting facts about helium?
Helium is a colorless, tasteless and odorless gas. Helium is the second most common element in the Universe (after hydrogen), making up around 24% of its mass. Helium is part of a group of chemical elements called noble gases, the other five that occur naturally are neon, argon, krypton, xenon and radon.
What is the period number the same as?
You’ve got Your Periods… Like PERIODic table.). All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
What is period and group in periodic table?
All the different elements are arranged in a chart called the periodic table. the horizontal rows are called periods. … the vertical columns are called groups. elements in the same group are similar to each other.
What are 3 uses for oxygen?
Common uses of oxygen include production of steel, plastics and textiles, brazing, welding and cutting of steels and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight and diving.
How much money does helium cost?
In fiscal year (FY) 2019, the price for crude helium to Government users was $3.10 per cubic meter ($86.00 per thousand cubic feet) and to nongovernment users was $4.29 per cubic meter ($119.00 per thousand cubic feet).