They're both a part of an atom.
Answer is: elements in group 1 will lose electrons to obtain a noble gas structure. They will lose 1 electron.
For example ₃Li 1s²2s¹ will lose one electron from 2s oribtal to obtain helium structure ₂He 1s².
Or sodium ₁₁Na 1s²2s²2p⁶3s¹ will also lose one electron to obtain neon structure ₁₀Ne 1s²2s²2p⁶.
Answer:
There are three isotopes of silicons. They have masses numbers of 28, 29 and 30. The average amount of silicons is 28.086alum
Explanation:
I learned this in class three days ago so I hope this is helpful i'm in high school ask me for help when ever you want Iĺl help you
Answer:
d=m/v If v increases then the density decreases. Denominator get larger
Explanation:
Answer:
Explanation:
The nuclear equation from which you have to identify the missing element is:
- ²³⁹₉₄ Pu + ¹₀n → ___ + ¹³⁴₅₄Xe + 3 ¹₀n
The superscripts to the left of each chemical symbol are the mass number of the atoms (number of protons plus neutrons) and the subscripts to the left of the chemical symbols are the atomic numbers of the atoms (number of protons).
Thus, such equation must be read as "an atom of plutonium-239 is bombarded with a neutron and produces one atom of an unkwon element, one atom of xenon-134, and 3 neutrons".
To find the identity of the missing element you must do two balances: mass number and atomic number.
Mass number:
Hence, the mass number of the missing element is 103.
Atomic number:
Hence, the atomic number of the missing element is 40.
In a periodic table you can find that the element with atomic number 40 is zirconium, Zr.
Thus, the identity of the missing isotope is zirconium-103, ¹⁰³₄₀Zr.
And the complete equation is:
- ²³⁹₉₄ Pu + ¹₀n → ¹⁰³₄₀ Zr + ¹³⁴₅₄Xe + 3 ¹₀n
