Samira’s son is older because there are 12 months in a year and we can gather that 12+12=24 so we know that Paulina’s son is younger because he is only 18 months.
Answer:
D. They have the same number of valence electrons
Explanation:
- The periodic table arranges elements into rows known as periods and columns known as groups or families.
- Elements in the same group share similar chemical properties.
- Additionally, they have the same number of valence electrons. For example, elements in group I have one valence electrons while those in group II have two valence electrons.
- Elements in the same period share similar features such as having the same number of energy levels. For example elements in period 4 have four energy levels.
Which reactions are you referring to?
Mid-Ocean Ridges
Two examples of Mid-Ocean Ridges are the Mid-Atlantic Ridge and the East Pacific Rise.
Explanation:
Mid-ocean ridges are mountain-like geographical features on the ocean floor. They usually line along the divergent boundaries of tectonic plates moving away from each other. This is because as the plates move in opposite direction, the vacuum in between the plates is filled by upwelling magma from the mantle. Usually the texture of the rocks that form these mountain ridges has bands. This is because, before the magma cools, the iron in the magma (due to its ferromagnetic property) aligns with the earths magnetic field. The earth magnetic flux flips over several 1000 years hence these bands orient themselves differently depending on the magnetic field orientation at the time they were formed.
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