The Structure of the atom
What is a subatomic particle found in the nucleus of an atom that has a positive electric charge?
proton
How do you determine the number of protons in a atom?
atomic number
What is a property of metals?
good heat conductors, shiny, malleable, ductile
How does atomic radius change across a period?
it decreases from left to right
What is a covalent bond?
a chemical bond where two atoms share one or more pairs of electrons
What is a subatomic particle found in the nucleus of an atom that has no electric charge?
neutron
What is the relationship between the atomic number and the number of protons in an atom?
What is a property of nonmetals.
bad conductors, brittle, dull
How does atomic radius change down a group.
it increases down a group
What is an ionic bond?
a bond where one atom donates an electron to another, resulting in the formation of positively and negatively charged ion
What is a subatomic particle that orbits the nucleus of an atom and has a negative electric charge?
electron
How can you calculate the number of neutrons in an isotope if you know the atomic number and the mass number.
subtract the atomic number from the mass number
What are metalloids?
an element that has properties that are in between metals and nonmetals
What are the trends in metallic character across a period?
it decreases from left to right
How do covalent bonds form.
when electrons are shared between atoms and are attracted by the nuclei of both atoms
What is the central part of an atom, composed of protons and neutrons, which contains most of the atoms mass?
nucleus
What happens to the number of electrons in an atom when it becomes an ion with a positive charge or a negative charge.
it loses one or more electrons
What are alloys?
mixtures of metals created by melting and mixing
How does metallic character change down a group?
in increases down a group
How do ionic bonds form?
when one atom transfers electrons to another atom, creating oppositely charged ions that then attract each other due to electrostatic forces
What is the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place on the periodic table?
atomic number
How do isotopes of the same element differ in terms of the number of neutrons?
they have the same number of protons but different number of neutrons,
What is an example of a alloy?
steel, brass, bronze
How does atomic number change across the periodic table?
it increases by one across a period and one down a group
What determines whether a bond will be covalent or ionic?
the difference in electronegativity between the atoms