atoms, ions and formulae Flashcards
(26 cards)
What is the smallest unit of an element?
Atom
True or False: An ion is an atom that has gained or lost electrons.
True
Fill in the blank: An atom consists of protons, neutrons, and ______.
Electrons
What charge does a positively charged ion have?
Positive charge
What is the term for a negatively charged ion?
Anion
What is the charge of a sodium ion (Na+)?
Positive charge
Which subatomic particle has no charge?
Neutron
What is the chemical formula for water?
H2O
How many protons are in a carbon atom?
6 protons
True or False: The atomic number of an element is determined by the number of neutrons.
False
What is the formula for calculating the number of neutrons in an atom?
Mass number - Atomic number
What is the charge of an electron?
Negative charge
Which element has the atomic number 1?
Hydrogen
Fill in the blank: An atom with the same number of protons but a different number of neutrons is called an ______.
Isotope
What do you call the outermost electrons of an atom?
Valence electrons
What is the chemical formula for carbon dioxide?
CO2
True or False: Ions can form through the process of ionization.
True
What type of bond is formed when electrons are shared?
Covalent bond
What is the chemical formula for table salt?
NaCl
How many electrons can the first shell of an atom hold?
2 electrons
What is the significance of the periodic table?
It organizes elements based on their atomic number and properties.
What do you call a charged atom?
Ion
Fill in the blank: The number of protons in an atom determines its ______.
Element identity
Name the three subatomic particles.
Protons, neutrons, and electrons
