Periodic Table Stuff
The periodic table is arranged in order of increasing ______________________.
atomic number.
The chemical name of KCl is
potassium chloride
What Greek philosopher first spoke about the idea of an atom?
Democritus
1 mole will always equal this many particles.
6.022 x 1023
True or False: All noble gases have 8 valence electrons.
False
An elements group number gives you this
# of valence electrons
Why do bonds form between atoms of elements?
to create a stable molecule or compound/ get a full octet or 8 valence electrons
The number of protons of an element is its
atomic number
15.6 kilometers is ________ cm
1,560,000
An atom with 65 protons and 63 electrons will have a charge of
2+
Elements in the same group have similar (not the same) _________________________.
chemical properties
A compound made up of nitrogen and hydrogen will form this type of bond.
covalent bond
When will an atom of an element be neutral?
number of protons and electrons is equal
Which quantity is SMALLER?
32.8 cm OR 3.86 x 10-4 km
32.8 cm
This guy discovered the electron
J.J Thomson
This reflects an elements ability to attract electrons to itself in a chemical bond.
electronegativity
Which of the following is NOT a property of ionic compounds?
high melting points, insoluble in water, contain metallic and nonmetallic elements
insoluble in water
Most of an atoms mass is found here
the nucleus
The mass of 1 mole of Cu3P is
221.62 grams
Which has more particles?
1 mole of Fe or 1 mole of Ag?
Neither
Which of these elements has physical and chemical properties similar to boron (B)?
Carbon, Aluminum, Beryllium, Oxygen
Aluminum
The formula for a compound formed by Co3+ and SO42- will be
Co2(SO4)3
An atom of an element has a mass of 40 grams and 20 neutrons. What is the identity of the element?
Calcium
A gold coin contains 3.47 x 1023 gold atoms. What is the mass of the coin? Give 4 significant figures & the proper units!
113.5 g/mol
The complete name of a compound formed by Ti3+ and Br will be
Titanium(III) Bromide