The two neutral atoms A and B have the same number of electrons and atomic number 11. So, the two elements are said to be same.
The electronic configuration of the element is the arrangement of the electrons in the atom of the element in energy levels, orbitals around the nucleus.
The electrons in the atoms of the element with lowest energy are written first before those with higher energy levels. Thus, the electronic configuration shows the electrons in the atoms of the element arranged in order of increasing energies.
The electronic configuration of atoms are given as
A = 1s² 2s² 2p⁶ 3s¹
B = 1s² 2s² 2p⁶ 5s¹
The number of electrons in both the elements is 11. Therefore, their atomic number is also the same i.e, 11. So, both the elements are the same.
To know more about atomic number:
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Answer:
is the compression in the spring
Explanation:
Given:
- mass of the bullet,
- mass of block,
- stiffness constant of the spring,
- initial velocity of the spring just before it hits the block,
<u>Now since the bullet-mass gets embed into the block, we apply the conservation of momentum as:</u>
Now this kinetic energy of the combined mass gets converted into potential energy of the spring.
is the compression in the spring
Add the image so we can answer it for you, 621
Answer: D
Explanation: I took the test.
I accidentally posted a comment on it too, sorry about that.
