Grade 11 Physics Semester Exam Practice Quiz

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Questions and Answers

What information does the molecular formula provide?

A. The simplest ratio of atoms in a molecule

What would the student be able to derive from the data of heating zinc powder in an open crucible?

A. I and II only

What is the molar mass of the gas according to the given experimental data?

$40.0\times8.31\times290/(98\times0.220)$

What is the maximum number of electrons in energy level n = 4?

<p>D. 50</p> Signup and view all the answers

Which statement best explains the first ionization energy of sulfur being lower than that of phosphorus?

<p>C. Sulfur has an unpaired electron in the outer p sub-level</p> Signup and view all the answers

Flashcards

Molecular Formula

The molecular formula represents the actual number of atoms of each element present in a molecule. It provides the exact ratio of atoms in the molecule, not just the simplest ratio.

First Ionization Energy

The first ionization energy is the minimum energy required to remove one electron from a neutral gaseous atom in its ground electronic state. It represents the strength of the attraction between the nucleus and the outermost electron.

Electron Configuration

Electron configuration describes the arrangement of electrons in an atom's orbitals, specifically indicating the number of electrons in each energy level and sublevel.

Energy Levels

Energy levels are regions around the nucleus where electrons are likely to be found, with higher energy levels located further away from the nucleus.

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Molar Mass

The molar mass of a substance is the mass of one mole of that substance. It's typically expressed in grams per mole (g/mol) and represents the mass of 6.022 x 10^23 particles (Avogadro's number) of that substance.

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