Answer:
All the elements in one group have the same number of valence electrons. ... Since elements in a group have the same number of valence electrons, they behave similarly in chemistry. An example would be the alkali metals (excepting hydrogen. Hydrogen is in this group only because it has one valence electron.
Explanation:
K, Mg, P, and O in increasing electronegativity. Use the chart attached below to reference for similar questions.
In order to determine the state of the manganese ion, we will look at the anion bonded to it.
MnN, N = -3 so Mn(III)
MnO, O = -2 so Mn(II)
MnBr2, Br = -2 so Mn(II)
Mn2S3, S = -2 so Mn(III)
Mn3P2, P = -3 so Mn(II)
MnI3, I = -3 so Mn(II)
2.
For this question we will have to check the number of protons of each element from the periodic table. After this, we will remove or add electrons until the desired charge is attained (charge is difference between number of protons and electrons) since the number of protons does not change.
K+: protons = 19, electrons = 18
Cl-: protons = 17, electrons = 18
Fe+2: protons = 26, electrons = 24
At constant pressure a known moles of gas has volume which is directly proportional to temperature (Charle's Law)
Thus V α T
Therefore
V1/V2 = T1 /T2
V1 = initial volume = 10 L
T1 = initial temperature= 280 K
V2 = final volume = 20L
T2 = final temperature = ?
T2 = T1V2 / V1 = 280 X 20 / 10 = 560 K
Thus the new temperature will also doubles up as volume is increased by two times
Answer:
A) Mechanical Weathering
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Explanation:
Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface