CHEMISTRY HIGH SCHOOL

Identify each of the following as a representative element or a transition element:A) Lithium
B) Platinum
C) Promethium
D) Carbon

Answers

Answer 1
Answer: The correct answer is B. Platinum is the transition element among the choices. The elements belonging to this group are those having a partially filled d or f subshell. It usually refers to the d-block transition elements of the periodic table.

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Which of the following is true of solids?a. All solids have equal melting points.
b. Ionic solids have higher melting points than molecular solids.
c. Molecular solids have higher melting points than all other types of solids.
d. It is impossible for solids to melt; therefore solids do not have melting points.

Answers

B. Ionic solids have higher melting points than molecular solids.

Isotopes of the same element have different ____.a. positions on the periodic table
c. atomic numbers
b. chemical behavior
d. mass numbers

Answers

Answer:

d. mass numbers

Explanation:

Isotopes are atoms that have the same number of protons (atomic number) but different number of neutrons. As the definition of mass number is the sum of protons and neutron in an atom, the isotopes have different mass numbers.
The answe is D. Mass number

Your teacher placed a drop of food coloring in a cup of water. the color slowly mixed into the water without being stirred. what does this tell you about water molecules?

Answers

Answer:

water molicules have space between them thus letting the food colour spread without stiring the water.

A 12 kg object experiences a net force of 120 N. What acceleration will this object experience?

Answers

Answer:

10 m/s²

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a = (f)/(m) \n

f is the force

m is the mass

From the question we have

a = (120)/(12) \n

We have the final answer as

10 m/s²

Hope this helps you

Is electronegativity the tendency to attract electrons?

Answers

Answer:

Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

Explanation:

Answer:

Yes

Explanation:

The higher the electronegativity the higher tendency to attract electrons, the lower the electronegativity the higher tendency to give away electrons/lose electrons.

Which bond pair does not have a polar covalent bond?A. P – Cl



B. O – H



C. S – Cl



D. H – Cl



E. Cl – Cl

Answers

The answer is E. Cl -- Cl

Chloride, Cl2, has a non-polar covalent bond because both molecules making up the compound are identical. This results to a diatomic molecule, which are known non-polar molecules. Since both sides of the bond are also the same, there is equal sharing of electrons. Polar covalent bonds are those that have unequal sharing of electrons.
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