Section 1 Quizzes Flashcards
a substance that cannot be broken down chemically to a simpler substance?
element
what element has 22 neutrons, 18 protons, and 18 electrons?
Argon
the building blocks to proteins are?
amino acids
what is the scientific one letter abbreviation for Nitrogen?
N
elements within one group have similar:
chemical properties
1 g = _______ mg (miligram)
1000
On a hot day, an ice cube melting into a puddle than evaporating is what type of change?
physical
express the number 4.42x10^-2 in standard notation
0.0442
express the number 12,300,000 in scientific notation
1.23x10^7
Which element makes up the highest percentage of human body weight?
Oxygen
How many electrons can the second electron shell accommodate ?
8
One mole of a substance contains 6.022 x 10^23 formula units, this value is known as?
Avagadro’s number
What are the charges for electron and neutrons?
an electron has a net negative charge and a neutron has a net neutral charge
The octet rule refers to the tendency of atoms to prefer to have _______electrons in the valence shell
8
What type of bond is formed by sharing electrons between atoms?
covalent
What is the compound formed between F-1 and Ca+2?
CaF2
How many Lewis dots are in the electron-dot symbol for boron (B)?
3
A water molecule contains how many Oxygen valence electrons?
8
Which of the following best describes the way ionic bonds are formed?
Metals lose electrons and nonmetals gain electrons to form bonds
What element forms diatomic molecules?
Iodine
A hydrocarbon with C-C triple bonds is ?
alkyne
The number of covalent bonds carbon (C) can form is?
4
The number of covalent bonds hydrogen (H) can form is?
1
A carbon bound to four hydrogens has what shape?
tetrahedral
