15 Questions
What is the definition of an atom?
The smallest unit of matter that still holds the properties of an element
How many elements are there in total?
118
What is the approximate size of an atom?
$10^{-10}$ meters
Which subatomic particle is positively charged?
Protons
What is the mass of a proton in atomic mass units (amu)?
$1$ amu
How many main types of subatomic particles are there?
3
Why are atomic mass units (amu) used to measure subatomic particles?
Grams are not practical for measuring such small particles
What defines an atom as a specific element?
Number of protons
Which subatomic particle has a negative charge?
Electrons
What type of bond is formed when two atoms share electrons?
Covalent bond
Which subatomic particle's number can change during nuclear reactions?
Protons
What is the total mass of an atom equal to?
Number of neutrons multiplied by the number of protons
Which subatomic particle is located in the nucleus and has no charge?
Neutrons
What do atoms with a different number of neutrons than average become known as?
Isotopes
What determines an element's position in the periodic table?
Atomic number
Learn about the fundamental unit of matter, the atom, which is the building block of elements. Discover how atoms are the smallest unit of matter that retain the properties of an element, and how elements cannot be broken down into simpler substances.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
