Do Now Test (1-18)

Front

What is the Bohr Model?

Back

The Bohr Model is a representation of the atom that depicts electrons orbiting the nucleus in defined paths or energy levels.

Front

How many protons does Gold have?

Back

Gold has 79 protons.

Front

What does the chemical formula 4Li2O represent?

Back

It represents 2 elements (Lithium and Oxygen), with 8 atoms of Lithium and 4 atoms of Oxygen.

Front

Which of the following elements are nonmetals: Hydrogen, Mercury, Sulfur, Oxygen?

Back

Hydrogen, Sulfur, and Oxygen are nonmetals; Mercury is a metal.

Front

What is the total number of atoms in the chemical formula 4H2O?

Back

The total number of atoms in 4H2O is 20 (8 Hydrogen and 4 Oxygen).

Front

What is the atomic number of Silicon?

Back

The atomic number of Silicon is 14.

Front

Define a molecule.

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What are the main components of an atom?

Back

The main components of an atom are protons, neutrons, and electrons.

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting the number of protons and neutrons in the nucleus.