Why do elements in a group on the periodic table have similar chemical properties? A.
same number of outermost electrons

B.
same number of protons

C.
similar atomic masses

D.
similar atomic numbers

Answers

Answer 1

Answer: do elements in a group on the periodic table have similar chemical properties because their atoms have the same number of electrons

A. same number of outermost electrons

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Why does methane have a low boiling pint?

Answers

Methane is an alkane. Alkanes are composed of a number of carbons (denoted by the prefix on the chemical name, e.g. meth-ane, eth-ane, prop-ane, but-ane...) which are saturated with hydrogen atoms (the largest number of hydrogens possible are bound to them). Methane has one carbon, which is saturated with 4 hydrogen atoms - this means that the chemical formula is CH4 (where the 4 should be subscript, but I can't work it out in this text field).

The boiling point depends on the strength of the intermolecular forces between each molecule - as the length of the molecule increases, so does the force of attraction between them because there are more points to attract together. Methane has a very short chain length of only 1 carbon, so the intermolecular forces are very weak. Because the forces are weak, very little energy is required to overcome them to allow the substance to become gaseous (gas molecules spread out to fill any space, requiring a negligible strength of intermolecular forces).

Consequently the boiling point of methane is so low that it is found in gaseous form almost all of the time on Earth - however Titan, one of the moons of Saturn, has seas of methane on its surface, because it is so cold there that it is possible for methane gas to condense into liquid.

In order to consider the boiling point of a substance, we need to think about the forces holding the molecules together. Because methane (CH4) is a non-polar molecule the molecules are held together only by London Dispersion Forces which are very weak and easy to break. These bonds break when methane boils and because they are weak, it boils at a low temperature.

Name an object that the magnet would repel

Answers

the negative side of another magnet

scientists want to place a telescope on the moon to prove their view of distant planets. The telescope weighs 200 pounds on Earth what will happen to the weigh of the telescope when it reaches thw moon?

Answers

The weight itself technically will not change. The pull of gravity lessens, making it appear that it is lighter on the moon.

Which of these did your answer include?Each hydrogen atom is bonded to the oxygen atom with a single bond.
The oxygen atom has two lone pairs.
The molecule is bent.
Oxygen is more electronegative than hydrogen.
Each O-H bond is polar.
The molecule is asymmetrical.
The asymmetry and the polar bonds produce an overall molecular dipole.
The oxygen atom has a partial negative charge, and the hydrogen atoms have a partial positive
charge.

Answers

The O2 atoms have a covalent bonding and are attracted to the electrons more strongly.

The sharing of the electrons gives them water molecules a slightly negative change near the O2 atom. A slight positive change near the H2.

Hence the option D is correct.

Learn more about the did your answer includes.

brainly.com/question/15913753.

The oxygen atom has a partial negative charge and the Hydrogen atoms have a partial positive charge

What planet has the largest dust storms?

Answers

Mars has the largest dust storms.

Why did Thomson’s results from experimenting with cathode rays cause a big change in scientific thought about atoms?A.His results gave people a picture of what atoms look like for the first time.
B.His results gave the first clues that atoms could be created and destroyed.
C.His results gave the first experimental evidence that matter is made up of atoms.
D.His results gave the first evidence that atoms were made up of smaller particles.