Atoms, Neutrons, Isotopes

What is the atomic number of Neon, Ne?

• 10
• 20.1798
• 10.1798
• 7

A neutral atom of the isotope ²⁶₁₂Mg would consist of

• 12 protons, 26 neutrons, 26 electrons
• 26 protons, 12 neutrons, 26 electrons
• 26 protons, 14 neutrons, 14 electrons
• 12 protons, 14 neutrons, 12 electrons

An atom is electrically neutral when

• protons and neutrons are the same
• protons and electrons are the same
• neutrons and electrons are the same
• neutrons balance the protons and electrons

Isotopes of the same element have the same number of 

• protons
• neutrons
• electrons
• not enough information

Iron-60 (atomic number 26) is an isotope that is often used to study meteorites.  How many neutrons does iron-60 have?

• 26
• 60
• 34
• 86

Four isotopes of lead include lead-204, lead-206, lead-207, and lead-208. The average atomic mass of lead is 207.2. Which isotope of lead is likely to be the most found in nature?

• 204

• 206

• 207

• 208

Which of the following particle pairs has approximately the same mass?

• protons and neutrons
• protons and electrons
• neutrons and electrons
• protons, neutrons and electrons

A carbon isotope consists of 6 protons, 6 electrons and 8 neutrons.  What is the mass number for this isotope?

• 12
• 14
• 6
• 8

Protons and neutrons are found in the center of the atom called the:

• nucleus

• neutron

• shell

• cell

The classification system for elements is called:

• Elements

• Periods

• The Periodic Table of Elements

• Families