Answer:
The period number tells which is the highest energy level occupied by the electrons.
Explanation:
- The period number (denoted by n) is the outer energy level that is occupied by electrons in an atom.
- The period number that an element is in, is the number of energy levels that the element has.
- When we move across a period from left to right in a periodic table the number of electrons in atoms increases within the same orbit.
Answer:
As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together. ... As heat is added, the molecules gain more kinetic energy. This shown in their increase motion. When heat is withdrawn, the particles slows down hope this helped
Answer:
Explanation:
(a) Unbalanced equation
(b) Balanced equation
(c) Molar masses
The only compound for which you need an atomic mass is water.
You look up the atomic masses of each element in the Periodic Table, multiply by their subscripts in the formula, and add.
(d) Molar Ratio
You want to convert moles of carbon dioxide to moles of water.
The balanced equation tells you that the molar ratio is 1 mol H₂O:1 mol CO₂.
(e) Significant figures
The only measurement you are given is "about 650 L." That tells you that the trailing zero is not significant.
The volume has only two significant figures, so the mass of water can have only two significant figures.
Note: Intermediate calculations should carry at least one extra digit (a guard digit) to prevent cumulative round-off errors, answers to be reported must have the correct number of significant figures.
(f) The calculation
You don't give the temperature and pressure of the gas, so I shall assume STP (1 bar and 0 °C). At STP, the molar volume of a gas
is 22.71 L.
14N and 15 N is the pairs that are isotope of each other.This is because isotope is are different kind of atoms of the same element which have same number of protons(atomic number) but different number neutrons and different mass number. 14N and 15N are isotope of nitrogen since has different neutron.
1 - In what organelle or membrane are triacylglycerols synthesized and fatty acids elongated?
A - Lysosomes
B - Peroxisome
C - Endoplasmic reticulum
D - Ribosomes
E - Nucleus
The answer is Endoplasmic reticulum