Periodic Table
What term refers to the number of protons of an element?
Atomic number
The two types of essential elements of life.
What are bulk elements and trace elements.
What is the date of Exam 1?
9/12
How are two atoms joined in a covalent bond?
they share one or more valence electrons.
What are weak interactions between non polar molecules?
Van der Wals
How many energy levels does the element Calcium have?
4
This number is the sum of neutrons and protons.
atomic mass
If an atom has 6 protons, how many electrons does it have if its neutral?
6
True or false. Covalent bonds can bind two molecules together.
False
Which type of bond occurs between two atoms with in a molecule?
Covalent
How many valence electrons does phosphorous have?
5
A variation of an element differing in the number of neutrons.
Isotope
How many orbitals are in the first shell? How many electrons does that hold?
1 orbital, 2 electrons
What is responsible for polarity in covalent bonds?
electronegativity
What is a hydrogen bond?
the attraction of a partial positive hydrogen atom and a partial negative atom (such as oxygen) between molecules.
Whats the difference between atomic weight and mass number? Which one is found on the periodic table?
Atomic weight is an average of all the varying isotopes of an element, and is usually found on the periodic table. A mass number is applied to a specific element.
What is the defining feature of any element?
Its number of protons.
an atom that loses an electron and gains a positive charge.
True or False. Ionic bonds share electrons
False
T or F. Hydrogen bonds happen between two charged molecules.
False.
Is Neon highly reactive or highly stable? How do you know?
Neon is a noble gas, in the eighth column of the periodic table, meaning it's valence shell is full, making it stable.
What 3 elements have the highest tendency to attract electrons?
Fluorine, oxygen, nitrogen
Which element is more likely to become an anion, fluorine or sodium? Why?
Fluorine, its high electronegativity makes it likely to steal electrons
What causes causes two atoms to become two ions in an ionic bond?
A large difference in each atom's electronegativity.
The making or breaking of chemical bonds, leading to changes in the composition of matter is called...
chemical reaction