chem mass molar mass empirical formula

Isotopes

Atoms of the same element with different number of neutrons but same number of protons

Protons

What defines an element

Valence electrons

What determine the chemical properties and reactivity of an isotope

Protons

Atomic number is the number of what?

Protons and neutrons

Mass number is what and what added

Natural abundance

Percentage of each isotope found naturally

Relative atomic mass

Weighted average of the mass of the atom of the isotopes

Relative atomic mass

This takes into account the abundance of each isotope of the element

Relative atomic mass

Is the standardized reference used worldwide

Average atomic mass

Refers to the weighted average mass of all the naturally occuring isotopes of an element in natural abundance

Relative atomic mass

It has no unit

Average atomic mass

Used a unit “amu” or “u”

Molecules

These are chemically bonded

Diatomic molecule

chemical particles made of exactly two atoms bonded together (can be identical or different)

International Union of pure and applied chemistry

Who is responsible for the systematic naming of molecules

Ions

Is an atom or group that carries an electric charge

Polyatomic ions

Are groups of atoms that bear an electric charge

Ionic compounds

Made up of metals and non metals: electrons get stolen and opposite charges attracg

Molecular compounds

Made of nonmetals: share electrons together (connected through covalent compounds)

Atoms

What are the building blocks of matter

Atoms

Smallest particle of an element which maintains the properties of that element

Compound

Substance when 2 or more atoms of different elements are chemically bonded

Molecular formula

Total number of atoms of each element in one compound

Empirical formula

Proportions of elements present in compound but not the actual number or arrangement of atoms

Empirical formula

What formula is useful in chemical analysis?

Empirical formula

What is commonly used for experimental data like % composition and the analysis of a new element

Empirical formula

Simplest whole number ration of atoms of each element in compound

Percentage composition

The percent by mass of each element in a compound

Percent composition

It is the percentage composition by mass

Percent composition

This tells us the make up of a substance

Helps identify compounds from experimental data

Percent composition

Used in food label, pharmaceutical

Atomic weight

Molar mass per element, found in table

Molecular weight

Molar mass of entire compound

Molar mass

Is the mass of one mole of atom of a pure element in grand that is numerically equal to the atomic weight of that element

Molar mass

It's unit is g/mol

6.02 × 10^23

Mole has how many particles?

Mole

Amount of a substance that contains as many elementary entiries (atoms, molecules, particles)

C12 atoms

What atom helped find out about the avogadro theory?

Lorenzo romano Amadeo Carlo avogadro di quaregna e di cerreto

Name of Italian mathematical physicist

Lorenzo romano Amadeo Carlo avogadro di quaregna e di cerreto

Famously known for avogadro law

1776-1856

Year avogadro lived and died

Antoine lavoisier

Who discovered the law of conservation of mass?

Molecular mass

Sum of the atomic masses (amu) in molecule