Concept 2-3 Atomic Structure Vocab Practice

What does the atomic number represent in an atom?

• The number of protons in an atom.

• The number of neutrons in an atom.

• The number of electrons in an atom.

• The total number of particles in an atom.

Tags

NGSS.MS-PS1-1

Which of the following identifies an element?

• Number of neutrons

• Number of electrons

• Number of protons

• Mass number

What is the mass number? Fill in the blank: The mass number is the number of _______ and _______ in the nucleus of an atom.

• protons, neutrons

• electrons, protons

• neutrons, electrons

• protons, electrons

According to the diagram, what is the mass number of Helium (He) if it has 2 protons and 2 neutrons?

• A) 2

• B) 4

• C) 6

• D) 8

Tags

NGSS.MS-PS1-1

What are isotopes?

• Atoms of the same element with different numbers of neutrons

• Atoms of different elements with the same number of neutrons

• Atoms of the same element with the same number of neutrons

• Atoms of different elements with different numbers of neutrons

Fill in the blank: Isotopes are atoms of the same element with different numbers of _____

• neutrons

• protons

• electrons

• molecules

What is the average atomic mass?

• The number of protons in an atom

• The typical weight of all the atoms in an element

• The number of electrons in an atom

• The symbol of an element

In the periodic table entry for Silicon (Si), what is the atomic mass?

• 28.086

• 12.011

• 40.078

• 63.546

What are the vertical columns on the periodic table called?

• Periods

• Groups

• Rows

• Blocks

Fill in the blank: The vertical columns on the periodic table are called _______.

• groups

• periods

• rows

• families