AP Chem Unit 1

AP Chem Unit 1

Assessment

Flashcard

Chemistry

11th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the ionic formula for lead(II) nitrate?

Back

Pb(NO3)2

2.

FLASHCARD QUESTION

Front

What is the formula for the binary ionic compound: aluminum sulfide?

Back

Al2S3

3.

FLASHCARD QUESTION

Front

If an element has two isotopes, one with a mass of 40.0 amu that is 75% abundant and an average atomic weight of 40.50 amu, what is the isotopic mass of the other isotope?

Back

42.0 amu

4.

FLASHCARD QUESTION

Front

How do you calculate the number of particles in a given mass of a substance?

Back

Use the formula: Number of particles = (mass in grams / molar mass) x Avogadro's number.

5.

FLASHCARD QUESTION

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom or ion.

6.

FLASHCARD QUESTION

Front

What is the trend of ionization energy across a period in the periodic table?

Back

Ionization energy generally increases across a period due to increasing nuclear charge.

7.

FLASHCARD QUESTION

Front

What is the trend of ionization energy down a group in the periodic table?

Back

Ionization energy generally decreases down a group due to increased distance from the nucleus and increased shielding.

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