ATOMS GENERAL
What subatomic particle has a positive charge?
What is proton?
An isotope is a variety of an element with a different number of, what?
What is neutrons?
A carbon atom has 7 neutrons, how would you write this isotope?
What is C-13
An ion does not have the same amount of _______ and ________.
What is protons & electrons?
A sodium (Na) atom has 11 protons and 10 electrons. How do you denote the charge on this atom?
What is Na+ or Na1+?
What is average atomic mass?
What is the weighted average of all isotopes of that element
Who created the first modern atomic theory?
Dalton. Solid Spheres
What charges do an electron and a neutron have?
What is negative & neutral?
The name of an isotope is the name of the element followed by a dash (-) and _____ __________ of the isotope.
What is the mass number?
A Bromine (Br) atom has 35 neutrons, how would you write this isotope?
What is Br-70?
How does an atom become an ion?
What is gaining or losing an electron
An oxygen (O) atom has 8 protons and 10 electrons. How do you denote the charge on this atom?
What is O2-?
What are the units for average atomic mass?
What is amu?
Who created the plum pudding model and what did it state?
JJ Thompson
Atoms of the same element have the same number of, what?
What is protons?
Isotopes have the same ______.
What is protons (or atomic number)?
A Tin (Sn) atom has 51 neutrons, how would you write this isotope?
What is Sn-101?
A positive ion is called a ______ and a negative ion is called a _________
What is cation and anion?
A Fluorine (F) atom has a charge of (-1) and its atomic number is 9. How many electrons does it have?
What is 10 electrons?
Calculate the average atomic mass for the following:
C-12 (98.93%)
C-13 (1.07%)
C-14 (.0001%)
What is 12.01 amu
Thompson was the first to discover that atoms have this
electrons/negative parts
Atomic mass equals the sum of, what?
What is protons & neutrons?
How you would write carbon isotopes with masses of 12 and 14
What is carbon-12 and carbon-14
An Arsenic (As) isotope is written as As-85, how many neutrons does it have?
What is 52 neutrons?
When an atom gains an electron, it gains a ____charge
What is negative?
A Copper (Cu) atom has 29 protons and 27 electrons. How do you denote the charge on this atom?
What is Cu2+?
Boron has an atomic mass of 10.81 amu according to the periodic table. However, no single atom of boron has a mass of 10.81 amu. Why?
What is 10.81 amu is a weighted average of all of the isotopes for Boron
Positive nucleus- Rutherford
Compare the masses of the 3 subatomic particles
protons and neutrons are almost equal, electrons have almost no mass
If isotope 1 weighs 2.50g, isotope 2 weighs 1.50g, and isotope 3 weighs 5.00g, and the average atomic mass is 4.80g, which isotope is the most abundant?
What is isotope 3?
If Titanium (Ti) isotope is written as Ti-50, how many neutrons does it have?
28
When an atom loses an electron, it gains a ____ charge
What is positive?
An Arsenic (As) atom has a charge of (-3). How many electrons does it have?
What is 36 electrons?
Calculate the average atomic mass for the following:
Si-28 92.93%
Si-29 4.67 %
Si-30 3.10%
What is 28.1 amu
Who first proposed that electrons "orbited" the nucleus?
Bohr