What is the difference between an independent variable and a dependent variable?

An independent variable is what is changed during an experiment, a dependent variable is what is measured.

The reaction between lithium and Fluorine is represented below. 2Li + F₂ --> 2LiF Which statement best explains why this reaction can take place?

The valence electron of lithium are transferred to fluorine in an ionic bond, so both atoms have complete outermost energy levels.

What can you conclude about hydrochloric acid (HCl) in the reaction of zinc with hydrochloric acid?

73 grams of HCl reacted because the total mass must be the same before and after the reaction.

Isotopes are ___________

atoms with a different number of neutrons

the sum of the protons and neutrons an atom has

How are protons, neutrons, and electrons that make up an atom distributed?

Protons and neutrons are in the center of the atom in region 1 and give the atom its mass.

Which elements are in the same family in the periodic table based on the graph of the atomic radius vs atomic number? Options: H and He, Xe and Cs, Na and K, H and Rn

Na and K, because each has the greatest radius compared with the elements that immediately follow it

How is the periodic table organized?

By atomic number from left to right.

Why do fireworks have different colors?

Because the electrons are falling back to their stable location and emitting light and all elements have a different number of electrons.

An atom will be neutral if which of the following are true of its arrangement of subatomic particles? Options: The number of its protons is equal to the number of its electrons., All of its electrons orbit its nucleus at exactly the same distance., The sum of the atom’s protons and neutrons is greater than zero., The nucleus of the atom contains more neutrons than anything else.

The number of its protons is equal to the number of its electrons.

Based on their relative positions in the periodic table, what conclusion can be drawn about these metallic elements?

Potassium is much more reactive than iron.

What can be said about the trend of electronegativity for the first 40 elements?

Electronegativity increases across a period left to right.

What can be said about the trend of the atomic radius for the first 40 elements?

Atomic radius increases down a group.

Which of the following statements best describes the electronegativity of the elements shown? Silicon has the lowest electronegativity., Selenium has a lower electronegativity than fluorine., Gallium has a higher electronegativity than carbon., Chlorine has the highest electronegativity.

Selenium has a lower electronegativity than fluorine.

Fall Final Review 2024 Flashcards

Student preview

51 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the Octet Rule?

Back

All atoms want 8 valence electrons in their outer most energy level to become stable.

2.

FLASHCARD QUESTION

Front

Electrolytes are

Back

ions that help with nerve signaling

3.

FLASHCARD QUESTION

Front

An ion is an atom that has

Back

lost or gained electrons

4.

FLASHCARD QUESTION

Front

What is the charge Ba tends to form to become stable?

Back

2+ charge

5.

FLASHCARD QUESTION

Front

Chemical reactions are the rearrangement of atoms into new bonds, where mass is neither created nor destroyed.

Back

True

6.

FLASHCARD QUESTION

Front

Activation energy is

Back

energy needed to start a reaction

7.

FLASHCARD QUESTION

Front

Based on the chemical reaction below, how many molecules of Oxygen (O2) react with 1 molecule of Methane (CH4)?

Back

2

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