Subatomic Particles
How many Neutrons does Sodium have?
Atomic Mass - # of Protons = # of Nuetrons
23 - 11= 12 Neutrons
Name the noble gases
He, Ne, Ar, Kr, Xe, Rn
How many electrons are in Oxygen -2?
There are 10. If an atom has a negitive charge, there are more Electrons than Protons.
Put the following set of atoms in order from lowest to highest in electronegativity:
P, Ga, Cl
Gallium (Ga), Phosphorous (P), Chlorine (Cl)
How many Subotomic Particles does Titanium have?
Protons + Neutrons + Electrons = Number of Particles
22 + (48-22) + 22 = 70 Subatomic Particles
What type of metal is Darmstadtium?
It is an unknown element.
What is the charge of Mangnaese atom with 21 electrons?
+4. Manganese contains 25 protons. Since there are 4 more positively charged particles than negative, it would have a +4 charge.
Which of the following has the highest atomic size?
La, Ce, Ra
Radium (Ra)
What is the Atomic Mass of Lead? (Lead has 82 Protons, 82 Electrons, and 125 Neutrons).
Atomic Number + Number of Neutrons = Atomic Mass
82 + 125 = 207(u)
Which of the following is a metalloid?
a) Arsenic
b) Gold
c)Iodine
d) Bismuth
Arsenic
p.s. the rarest element!
How many subatomic particles are in Chromium with a charge of +6.
# of Prontons + # of Electrons + # of Neutrons= # of subatomic Particles
24 + (24-6)+ (52-24) = 70
Which group of elements shown would have the lowest Ionization energy?
Group V
Group VI
Group IV
Group IV
What is the correct order from largest to smallest for atomic size?
Cm, Gd, Eu
Curium (Cm), Europium (Eu), Gadolinium (Gd)