Ch 4/5 Flashcards
which subatomic particle’s are in the nucleus
protons and neutrons
The smallest particle of an element is called
atom
Very small center core of an atom
nucleus
have no charge and are neutral
neutrons, atoms and compounds
which part of the atom is negative and moves around the nucleus
electrons
each element is given a specific blank that usually consists of one or two letters
symbol
Mendeleev created the first periodic table by arranging elements in order of
increasing atomic mass
how did chemist change Mendeleev periodic table in the early 1900s
added elements and arranged in order of increasing atomic number
how does nuclear fusion create new elements inside stars
smaller nuclei collide and combine forming larger nuclei
In stars matter exists in this state
plasma
most of the elements that form a zigzag line in the periodic table belong to one major group what is the group
metalloid
which group contains the most elements
transition metals
elements that easily transfer electricity and heat display the property known as
conductivity
which attorneys that models to be pounded into sheets as an aluminum foil or be in into complex shapes
malleability
A substance that will conduct electricity only under certain conditions is called a
semi conductor
The almonds and a column of the periodic table have similar
characteristics
vertical column of elements in the periodic table is called
A group/family
horizontal row of elements in the periodic table is called
a period
most metals are in what form at room temperature
solid
which term means that metals can be pulled into thin strands or wires
ductility
The valance electrons are those electrons most blank tell by the Atom in its outer shell
loosely
blank particle is positively charged and consist of two protons and neutrons
alpha particle
what is a beta particle
fast-moving electron given off by nucleus during radioactive decay
what is a GammaRay
hey are you giving off during radioactive decay similar to x-rays
what is the attraction between two oppositely charged ions
ionic bond
each family in the periodic table has its own characteristic properties based on the number of
valance electrons
atom loses an electron it becomes
positively charged ion
when an Adam Gaines an electron it becomes
hi negatively charged ion
Ions that are made of one or more atoms are examples of
polyatomic ion
A chemical bond formed when two atoms share electrons is called
covalent bond
covalent bond in which electrons are shared equally
Nonpolar
covalent electrons are shared equally is
polar
