Elements
Give the symbol for selenium
Se
The subatomic particle that has a positive charge is a
proton
Isotopes are atoms that have different number of
neutrons
The D block consists of groups
3B-2B (1B-8B)
Which element has this electronic configuration 1s22s22p5?
Cl
Classify Ca as a metal, metaloid, or nonmetal
metal
negligible
In an isotope symbol the _________ number is the superscript and the _________ number is the subscript
The p block consists of groups
3A-8A
Which element has this electronic configuration?
1s22s22p63s23p64s23d1
a _________ is a substance that is formed by chemically combining two or more elements
compound
These two subatomic particles are found in the nucleus
17 protons, 17 electrons, 20 neutrons
Alkali metals are found in the group
1A
Write the electron configuration for Ge
1s22s22p63s23p2
Classify Sb as a metal, metaloid, or nonmetal
metaloid
Mass number is equal to ________ + __________
neutrons plus protons
the weighted average of the mass of the naturally occurring isotopes of a particular element reported in AMUs is
atomic weight
Halogens are found in group
7A
write the electron configuration for I
1s22s22p63s23p64s23d104p65s24d105p5
Classify Xe as a metal, metaloid, or nonmetal
nonmetal
The mass number of an element that has 16 protons, 16 electrons, and 17 neutrons is
33
Silver-107: 106.91 amu, 51.84% abundance
Silver-109: 108.90 amu, 48.16% abundance
107.9 amu
As you go down the periodic table, the size of the atoms
increase
Write the electron configuration for Pr
1s22s22p63s23p64s23d104p65s24d105p66s24f2