6th-Atoms and Molecules

what is chemistry?

metalloids only have properties of nonmetals

what group of elements on the periodic table are gas at room temperature and not good conductors of heat and electricity

the nucleus is the center of the atom that is made up of ___________ and _________________.

what part of an atom has a negative charge?

a normal atom has a different number of protons and electrons.

what is formed by hydroxide ions when they are dissolved in water?

which of the following is characteristic of metals?

what is the term for when atoms come from 2 or more different elements during a chemical reaction?

what is formed when hydrogen ions dissolve in water?

what part of the atom has no charge?

ionic bonds form when positive and negative ions attract each other, and the bonds are held together by opposite charges

anything that has mass and takes up space is called _________________.

______________ are vertical columns on the periodic table.

what is the term used to describe the number of protons in an element?

the main part of the atom that has a positive charge is called the ___________________.

when the outer shell of an atom is completely full the shell closes. That means the atom is unstable.

what is a substance that contains only one kind of atom?

metals are gas at higher temperatures, but they are solid at room temperature.

________________________ are the horizontal rows on the periodic table.

what is the term on the periodic table for when you add protons and neutrons together?

what is a compound that is made of 2 or more substances that are not chemically linked?

what is the space representing the average distance from electrons from the nucleus?

what is the term for atoms that have gained or lost electrons?

the atomic theory of atoms is based on the idea that electrons move in shells

what is the smallest unit of an element?

_____________________ are formed when atoms join with other atoms to form units.

which of the following is NOT one of the 3 main parts of an atom?

Niels Bohr is known for research on the atomic structure, and he even developed the atomic bomb.

Dmitri Mendeleev is the scientist who came up with a system to organize all of the elements known at the time.