Who is credited with creating the first periodic table?
British chemist John Newlands was the first to arrange the elements into a periodic table with increasing order of atomic masses. He found that every eight elements had similar properties and called this the law of octaves.
How did Moseley establish more accurate periodic table?
by arranging the elements according to atomic mass instead of atomic number. by arranging the elements according to atomic number instead of atomic mass. by arranging the elements into horizontal periods.
How Moseley’s work contributed to the development of the periodic table?
In 1913 he used self-built equipment to prove that every element’s identity is uniquely determined by the number of protons it has. His discovery revealed the true basis of the periodic table and enabled Moseley to predict confidently the existence of four new chemical elements, all of which were found.
How were the periodic tables arranged by Mendeleev and Moseley similar?
According to Moseley, similar properties recur periodically when elements are arranged according to increasing atomic number. Atomic numbers, not weights, determine the factor of chemical properties. Mendeleev ordered his elements in order of their relative atomic mass, and this gave him some problems.
Which element does the electron configuration 1s22s22p2 represent?
In a periodic table you can find that the element with atomic number 6 is carbon. So the answer is C.
Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p3?
antimony atom
What element is 1s2 2s2 2p?
| Element | Atomic number | Electron configuration |
|---|---|---|
| helium | 2 | 1s2 |
| lithium | 3 | 1s22s1 |
| beryllium | 4 | 1s22s2 |
| boron | 5 | 1s22s22p1 |
Which element has an electron configuration that ends in p2?
Boron ends in 2p1. In group 4A or 14, all elements end in p2.
What element can be found by an ending electron configuration of 3s2?
element Silicon
What element can be found by an ending electron configuration of 2p3?
The transition elements fill the D orbital, and the Lanthanide and Actinide series fill the F orbital. 1. Element with electron configuration 1s2 2s2 2p3 is Nitrogen (N.) It has two electrons in 1s, two in 2s, and three in 2p (arbitrarily two in 2px and 1 in 2py.)
What element is 1s2 2s2 2p6 3s2 3p6 4s2 3d2?
Electron Configuration Match 1–Complete Address
| A | B |
|---|---|
| potassium | 1s2 2s2 2p6 3s2 3p6 4s1 |
| calcium | 1s2 2s2 2p6 3s2 3p6 4s2 |
| chromium | 1s2 2s2 2p6 3s2 3p6 4s1 3d5 ! |
| copper | 1s2 2s2 2p6 3s2 3p6 4s1 3d 10 ! |
What does 1s2 2s2 2p6 mean?
b. 1s2 2s2 2p6 This represents 2 electrons in the s subshell of the first energy level , 2 electrons in the s subshell of the second energy level and 6 electrons in the p subshell of the second energy level.
What does the 1 in 1s2 stand for?
It means there are 2- electrons in first energy level s-subshell and 2-electrons 2nd energy level s- sub shell and 2-electrons in 2nd energy level p-sub shell. Energy level. Electrons. s – orbital.
What does the S mean in 1s2?
The number in superscript is the number of electrons in a sub-shell. Each sub-shell can hold only a certain number of electrons. The s sub-shell can hold no more than 2 electrons, the p sub-shell can hold 6, the d sub-shell can hold 10 and the f sub-shell can hold as many as 14.
What does 1 in 1s stand for chemistry?
The orbital occupied by the hydrogen electron is called a 1s orbital. The “1” represents the fact that the orbital is in the energy level closest to the nucleus. The “s” tells you about the shape of the orbital.
Why are they called SPDF orbitals?
The orbital names s, p, d, and f stand for names given to groups of lines originally noted in the spectra of the alkali metals. These line groups are called sharp, principal, diffuse, and fundamental.