Answer:
Oxygen. Oxygen is the most abundant element contained within living organisms, composing about 65% of the human body.
Explanation:
Answer:
Element name: Krypton
Symbol: Kr
Mass Number: 79 AMU
Charge: 0, electrons and protons cancel out.
ion: none, it is a halogen.
Explanation:
Krypton is the 36th element on the periodic table and has 36 protons. The mass is protons plus nuetrons so 36 + 43 is 79 AMU or Atomic Mass Units.
Answer:
[Co(H2O)3(CO)3]3+
Explanation:
If an octahedral specie has the general formula EX3Y3, the X groups may be arranged to be on one face of the octahedron and the Y groups may also be arranged to be on the other face of the octahedron or lie in the plane of the central atom.
The two stereo isomers described above are called fac (facial) and mer (meridional) isomers.
Only [Co(H2O)3(CO)3]3+ can exhibit this type of isomerism among the options in the questions since it has the general formula, EX3Y3.
1. New moon, waxing gibbous, Full moon, and waning crescent are the main ones but there are more.
2. The revolution of the Earth is 365.25 days while the revolution of the moon is 28 days. Also, the Earth orbits the sun while the moon orbits the Earth and vaguely orbits the sun due to the orbit of the Earth.
3. Tidal waves, seasons, and the lunar cycle.
4. Moonlight is light that is reflected off the moon's surface that comes from the sun. This "lights" the moon up. Sunlight is light that comes from the sun which is made by a bunch of chemical reactions.
Good luck!
Answer:
Most positive = rubidium
Most negative = fluorine
Explanation:
Electron affinity of an element is the energy released when an electron is attached to a neural atom to form an ion in its gaseous state.
X + e⁻ → X⁻
Electron affinity is similar to electronegativity which is the tendency at which an atom accepts an ion towards itself.
Electron affinity increases across the period and decreases down the group in the periodic table.
In the above option,
Fluorine has the highest electron affinity
Rubidium has the lowest electron affinity
Tellurium and then finally Phosphorus
Helium in this case would have the lowest electron affinity because it has filled orbital and does not require any electron to attain stability. Technically, Helium has the lowest or is expected to have the lowest electron affinity which is close to zero according to quantum mechanics.
Most positive = rubidium
Most negative = fluorine.
You can check periodic table for their exact values