Matter, Energy, and Mixtures
What is matter.
All matter is composed of a limited number of substances called____________?
What are elements.
The atom's subatomic particles that reside within the nucleus and are positively charged are called _______________.
What are protons.
The number that represents the number of protons in an atoms is the _____________.
What is the atomic number.
Nickel - Ni has a atomic number of 28 - How many protons does it have?
Has no mass and does not take up space; can be measured only by its affects on matter.
What is energy.
A complete listing of all the elements appears in the __________________.
What is the periodic table.
The subatomic particle that is negatively charged.
What are electrons.
The number that represents the sum of the protons and neutrons of an atom.
Hydrogen -3 is a isotope- whats its mass and neutrons??
Mass is 3
Neutrons 2
Is a salad a heterogeneous or homogeneous mixture?
Heterogenous
Each element is composed of more or less identical particles or building blocks called ____________.
What are atoms.
The subatomic particles that have no charge.
What are neutrons.
Where do you get your protons from?
Atomic #
Is air a mixture?
YES
We designate each element by a one- or two-letter chemical shorthand called an _________________.
What is an atomic symbol.
What is the smallest part of an element?
An Atom atomic paycheck
Atoms that have the same number of protons but different number of neutrons are referred to as
What are isotopes.
Ions that are positively charged are called
What are cations.
Most matter is one of three forms. What are the three main states?
Solid, Liquid, or Gas
What particle surrounds the nucleus?
Electron
Give the formula for Neutrons
N= Mass - P
What happens when an atom gains or loses an neutron
Becomes an Isotope
Ions that are negatively charged are called
What are anions