by atomic mass/weight Columns in the periodic table the sum of the number of protons and neutrons in an atom T or F: number of electrons in the outer energy level that determines the chemical properties of the element How did Mendeleev classify the elements

How did Mendeleev classify the elements

True Types of metals How did Mendeleev classify the elements Atoms of the same element with different numbers of neutrons are called T or F: The periodic table is organized is organized by atomic number because it always increases left to right

T or F: The periodic table is organized is organized by atomic number because it always increases left to right

True properties of nonmetals what does a chemical symbol represent T or F: the mass of an neutron is about equal to the mass of a proton T or F: The central core of an atom is called the nucleus

T or F: The central core of an atom is called the nucleus

nonmetals what do scientists believe caused naturally occurring elements T or F: The central core of an atom is called the nucleus electrons in the outer most level also called what Elements that are gases, or are a brittle solids, and are poor conductors at room temp are

Elements that are gases, or are a brittle solids, and are poor conductors at room temp are

noble gas what does a chemical symbol represent Each row in the periodic table ends with? protons vs electrons properties of nonmetals

Each row in the periodic table ends with?

true halogens (group 17) Each row in the periodic table ends with? T or F: number of electrons in the outer energy level that determines the chemical properties of the element The horizontal rows on the periodic table are called

T or F: number of electrons in the outer energy level that determines the chemical properties of the element

isotopes Electron dot diagram protons vs electrons Elements that are gases, or are a brittle solids, and are poor conductors at room temp are Atoms of the same element with different numbers of neutrons are called

Atoms of the same element with different numbers of neutrons are called

electron Each row in the periodic table ends with? A particle that moves around the nucleus is a 2 types of ions Isotopes have a different number of

A particle that moves around the nucleus is a

Science Chapter 16

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Chemistry - Periodic Table of Elements

user_hodr Created by 9 mon ago

Cards in this deck(38)

by atomic mass/weight

True

nonmetals

noble gas

the vertical columns in the periodic table are called groups or families - tells how many valence electrons there are in the outer level - elements in each group have similar properties

the number of electrons is equal to the number of protons - Energy levels closer to the nucleus have less energy than those levels that are farther away - Elements that are in the same group have the same number of electrons in their outer energy level

true

isotopes

electron

show how the electrons in the outer energy level are bonded when elements combine to form compounds. - uses the symbol of the element and dots to represent the electrons in the outer energy level

neutrons

periods

protons

the outer energy level is completely full

isostopes

atomic mass

dull, brittle, poor conductors of electricity and heat, not malleable

Malleable, Ductile and Good Conductors of Heat and Electricity

properties of both metals and nonmetals: okay conductors, can be shiny or dull

true

False, their the MOST stable - due to a full outer level

amu

the weighted-average mass of an element's isotopes according to their natural abundance

most reactive nonmetals

cations (positive) and anions (negative)

Neutron

alkali metals, alkaline earth metals, transition metals, other

protons + / in the nucleus electrons - / flowing around the nucleus

nucleus

valence electrons

a region around the nucleus of an atom occupied by electrons

true

element name

vertical columns

most reactive metal on the periodic table - reactive cause they have an extra electron

# of protons = # of electrons

sun + star and fusion

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Science Chapter 16

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