Elements Flashcards
(27 cards)
What is an element?
A substance that cannot be broken down into simpler substances by chemical means.
What is the atomic number of an element?
The number of protons in the nucleus of an atom of that element.
True or False: The mass number is the sum of protons and neutrons in an atom.
True
What is the mass number of an atom with 6 protons and 6 neutrons?
12
Fill in the blank: The atomic number determines the ______ of an element.
identity
Which of the following elements has the atomic number 1? A) Helium B) Hydrogen C) Lithium
B) Hydrogen
What is the primary use of oxygen?
Respiration and combustion.
What does the term ‘isotope’ refer to?
Atoms of the same element with different numbers of neutrons.
True or False: All isotopes of an element have the same chemical properties.
True
What is the chemical symbol for gold?
Au
Which element is used in batteries and has the atomic number 3?
Lithium
Fill in the blank: The mass number of an element is always a ______ number.
whole
What is the atomic number of carbon?
6
What element is commonly used in light bulbs?
Tungsten
True or False: The atomic mass is always a whole number.
False
What is the primary use of helium?
Inflating balloons and as a cooling medium in cryogenics.
Which element has the highest atomic number that occurs naturally?
Uranium (atomic number 92)
Fill in the blank: Elements in the same column of the periodic table have similar ______.
properties
What is the atomic number of sodium?
11
Which element is essential for the production of thyroid hormones?
Iodine
What is the chemical symbol for silver?
Ag
True or False: The atomic number can change for an element without altering its identity.
False
What is the main use of nitrogen?
To make fertilizers and in the production of ammonia.
What is the mass number of an atom with 15 protons and 16 neutrons?
31
