General Chemistry I - Final Exam Review

Front

What does it mean for atoms to be isoelectronic?

Back

Atoms are isoelectronic when they have the same number of electrons, resulting in the same electron configuration.

Front

Which atom is isoelectronic with argon?

Back

Titanium ion (Ti⁴⁺) is isoelectronic with argon.

Front

What is the volume of a gas at STP?

Back

At STP (Standard Temperature and Pressure), one mole of an ideal gas occupies 22.4 liters.

Front

How do you calculate the volume of a gas at different conditions using the Ideal Gas Law?

Back

Use the formula: (P1 * V1) / T1 = (P2 * V2) / T2, where P is pressure, V is volume, and T is temperature in Kelvin.

Front

What is the empirical formula of a compound?

Back

The empirical formula is the simplest whole-number ratio of elements in a compound.

Front

How do you determine the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Atomic number.

Front

What is the molar mass of water (H₂O)?

Back

The molar mass of water is 18.0 g/mol.

Front

What is the empirical formula of Na₂SO₄·7H₂O?

Back

The empirical formula is Na₂SO₄·7H₂O, indicating 7 water molecules are associated with each formula unit of sodium sulfate.

Front

What is the outer electron configuration of an element in Period 5, Group 3A?

Back

The outer electron configuration is 5s²5p¹.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.