Chemistry Flashcard

Front

A neutral atom may contain 10 protons.

Back

11 neutrons and 10 electrons.

Front

To identify an element, you need to know the number of _______ in its nucleus.

Back

protons.

Front

Which of the following is NOT a characteristic of the atomic nucleus?

• It is positively charged.
• It occupies most of the atom's volume.
• It is extremely dense.
• It contains most of the atom's mass.

Back

It occupies most of the atom's volume.

Front

The element chlorine has two main isotopes – one with an atomic mass of 35.45 and another with an atomic mass of 37.45. Based on the average atomic mass listed on the periodic table, which isotope is more abundant?

Back

The one with an atomic mass of 35.45.

Front

An atom with 7 protons, 7 neutrons, and 10 electrons has an atomic number of _____?

Back

7

Front

An atom with 7 protons, 7 neutrons, and 10 electrons has a mass number of _______.

Back

14

Front

What is the number of valence electrons in a typical atom of calcium?

Back

2

Front

Which force is responsible for holding the nucleus of an atom together despite the repulsion between protons?

Back

strong nuclear force

Front

The arrangement of electrons in an atom is determined by the number of _______ present.

Back

electrons

Front

Which of the following particles is not located in the nucleus of an atom? protons, neutrons, electrons, nucleons

Back

electrons