Answer:
Protons and neutrons which packed tightly into central core of the atom.
Explanation:
Atoms are composed of three subatomic particle; electron, proton and neutron. Electrons are negatively charged, protons are positively charged whereas neutrons are neutral, hence does not have any charge.
Out of three, protons and neutrons are present in the nucleus of the atom.
Nucleus is the central part of the atom possessing most of the mass of the atom. In the nucleus, protons and neutrons are tightly packed with the help of nuclear force.
Electrons are present around the nucleus also called electron cloud.
Therefore, nucleus are composed of protons and neutrons which packed tightly into central core of the atom
Answer:
<em>C</em> NaOHsln = 0.125 M
Explanation:
Molarity (M) [=] mol/L
∴ moles NaOH = (0.125 L)(0.15 mol/L) = 0.01875 mol
∴ Vsln = 150 mL = 0.150 L
New Molarity:
⇒ <em>C</em> NaOH = 0.01875 mol/0.150 L
⇒ <em>C</em> NaOH = 0.125 M
Answer:
Explanation:
It depends on how this is done. If you raise the pressure, the nitrogen will disappear (liquify) and all that will be left will be the 21 % oxygen and the 1% argon.
The process is very complicated because the boiling point of nitrogen keeps on changing. The boiling point is unstable.
Unpaired electrons are those electrons which exist singly in orbital, without making pair with other electron
CALCIUM:
Atomic Number 20
Electronic Configuration; 1s², 2s², 2p⁶, 3s², 3p⁶, 4s²
Number of Unpaired e⁻s; Zero
ARGON:
Atomic Number 18
Electronic Configuration; 1s², 2s², 2p⁶, 3s², 3p⁶
Number of Unpaired e⁻s; Zero
ALUMINIUM:
Atomic Number 13
Electronic Configuration; 1s², 2s², 2p⁶, 3s², 3p¹ (Ground State)
Electronic Configuration; 1s², 2s², 2p⁶, 3s¹, 3px¹, 3py¹ (Excited State)
Number of Unpaired e⁻s; 1 in Ground state and 3 in Excited State.
CARBON:
Atomic Number 6
Electronic Configuration; 1s², 2s², 2px¹, 2py¹ (Ground State)
Electronic Configuration; 1s², 2s¹, 2px¹, 2py¹, 2pz¹ (Excited State)
Number of Unpaired e⁻s; 2 in Ground state and 4 in Excited State
