atoms are made of 3 types of sub atomic particles- protons, neutrons and electrons
from these 3 particles, electrons are responsible for participating in chemical bonds. therefore chemical properties of elements are based on the number of electrons present.
valence electrons are the number of electrons in the outermost energy shell that are involved in chemical bonds.
atoms with same number of valence electrons are grouped in to columns called groups.
therefore elements of the same group have same number of valence electrons, hence similar chemical properties.
from the options given
only Be and Mg belong to the same group they both belong to group 2 with 2 valence electrons
therefore Be and Mg have similar chemical properties
answer is
1) Be and Mg
Your answer is A because the electron is removed and changed into a new proton which means that the atomic number is going up so does the element number.
Answer:
4d orbital.
Explanation:
Hello!
In this case, since zirconium's atomic number is 40, we fill in the electron configuration up to 40 as shown below:
![1s^2,2s^2,2p^6, 3s^2,3p^6,4s^2,3d^{10},4p^6,5s^2,4d^2](https://tex.z-dn.net/?f=1s%5E2%2C2s%5E2%2C2p%5E6%2C%203s%5E2%2C3p%5E6%2C4s%5E2%2C3d%5E%7B10%7D%2C4p%5E6%2C5s%5E2%2C4d%5E2)
Thus, the orbital 4d is partially filled.
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Answer:
i think its A
Explanation:
bc the nucleus is the very center of whatever the organism is.
Following are the advantages of corrosion: A layer of protection: A layer of oxide is formed in surface corrosion, which protects the inner metal from corrosion. Sacrificial anodes such as zinc is used as a preventive measure to stop corrosion of other metals.