Atoms
An ____________is the basic particle from which all elements are made
What is an atom?
In a neutral atom, the number of protons is always equal to the number of ________________________
What are electrons?
Vertical columns on the periodic table are called ____
What is groups or families?
Who is credited with being the first person to arrange a table of elements?
Who is Dimitri Mendeleev
Brittleness is a characteristic of
What are non metals?
The nucleus of an atom contains _______________ and ____________________.
What are protons and neutrons?
What is the charge of the nucleus of an atom?
What is positive?
There are ________ groups or families on the Periodic Table of Elements.
What are 18?
Elements have similar properties within the same
What is group or families?
Elements to the right of the stair-step on the periodic table are
What are non metals
All ________________________ are electrically neutral and have no charge.
What are neutrons?
What does the mass number represent?
What is the sum of protons and neutrons, which is the mass of the atom.
The horizontal rows on the periodic table are called ___________________
What are periods?
These metals are used as semi-conductors in computer chips
What are metalloids?
The ability to be drawn into thin wire is called
What is ductile?
An atom with 3 electrons must have how many protons?
What are 3?
Most of the mass of an atom comes from _____
What is the nucleus (protons ad Neutrons)?
Today's periodic table is arranged in which order
What is increasing atomic number?
Which family has the least chemically reactive elements on the periodic table
What are noble gases?
The ability to transmit heat or electricity readily is called
What is conductivity?
What is the maximum number of electrons in the first and second energy level of the electron cloud?
What are 2,8?
What does the atomic number of an atom represent?
What is the number of protons in the nucleus?
At room temperature, most elements are in the _____ phase.
What is a solid?
On the periodic table, which group are the noble gases?
What is group 18?
The ability to be hammered into sheets or shaped is called