Which of the following has an atomic mass of approximately 1 amu?

1. Which subatomic particle has a negative charge?

1. Which equation would you use to find the atomic mass of an element?

1. How many electrons are present in a neutral Bromine atom with a mass number of 87?

1. An atom has 45 protons and a mass number of 100. How many neutrons does it contain?

1. An atom with 15 protons and 16 neutrons is an atom of what element?

1. How many electrons are present in a neutral atom of Fluorine?

1. How many protons, neutrons, and electrons respectively does ¹²⁷I have?

1. How many protons, neutrons, and electrons respectively does Al-27³⁺ have?

1. C-13 and C-14 are _______________________ of the same element.

The atom pictured below would have what charge?

What is the atomic number of the atom pictured here?

1. Atoms that have gained or lost electrons are called _________________. 

1. Atoms of the same element having the same atomic number but different mass are called

1. An atom is considered “neutral” if it has the same number of __________________________. 

The electron dot diagram below represents which of the following?

1. A positive ion is called a ___________________. 

1. A negative ion is called a ___________________. 

1. The maximum number of electrons that the 3rd energy level (electron ring) can hold is?

1. The elements chlorine and iodine have similar chemical properties because they

1. The most reactive metals belong to which group of the periodic table?

1. Which of the following is the most reactive nonmetal element?

An unknown substance is discovered. The substance is dull, breaks easily, and is a poor conductor. Based on these observations, the substance must be a

1. How many valence electrons does an atom of Helium have?

___________________ is the only metal that exists as a liquid at room temperature.

1. ______________________ is the only non-metal that exists as a liquid at room temperature. 

1. The noble gasses are highly unreactive.

Elements in groups 3 through 12 are known as the _______________________.

This could be the dot diagram of

Which of the following shows a correct Lewis dot structure?

Which of these is correct?