Practice %23 %23 Element Symbol Charge +, 0, - Protons Neutrons electrons Carbon-13 Hydrogen-2 1 Не 2 Nitrogen 7 7 Oxygen 8 + 11 12 12 List any ions of an element from the table List any isotopes of an element from the table 6p 7n 40 11p 12n 13e 7e 13+ 14 n How many different elements are pictured above? Ions?

Q: In which set of elements would all memebers be expected to have very similar chemical properties? A)…

A: Periodic table represents the arrangement of the elements in increasing order of their atomic…

Q: A specific isotope of an element is known to have 15 protons and 16 neutrons. Which symbol would…

A:

Q: A sample of element Z has two naturally occurring isotopes.  The isotope Z-24 makes up 68.9% of the…

A: Interpretation: We have to calculate average atomic mass.

Q: # of protons Element Atomic # of Mass number # of electrons symbol number neutrons 23 51 23 77 115…

A:

Q: An element has three isotopes with the following masses and percent natural abundances. Determine…

A: Given that,

Q: The number of subatomic particles represented by : Au*+ 197 O 79 Protons, 118 Neutrons, 79 electrons…

A: Applying formula  A=Z+n

Q: Neon has three different isotopes.  90.51% of neon atoms have a mass of 19.992 amu.  0.27% of neon…

A:

Q: Element Atomic Symbol Symbol Be 121 Sb 51 Atomic Mass Number Number 8 Protons Neutrons Electrons 51…

A: -> Atomic number = number of proton = number of electron (for element) -> Atomic mass = proton…

Q: An element has three naturally occurring isotopes with the following masses and natural abundances:…

A: In order to calculate relative atomic mass, simply multiply each isotopic mass by the percentage…

Q: Fill in the table. Element Number of Protons Number of Neutrons Number of Electrons Mass Number…

A:

Q: Consider this ionic isotope. The identity of the element is missing. 39 ? 2+ 20 Which three…

A: The symbol of an element is written as :  AzX  Here , A is mass number.  Z is Atomic number X is…

Q: Consider the isotope nickel-60 which has the following nuclear symbol, nickel-60.  Which statement…

A: The nuclear symbol is 28Ni60.

Q: Try to complete the missing information for these three isotopes using only the data provided.…

A: Answer : Isotope means same number of protons and different number of neutrons .

Q: How many electrons, protons, and neutrons are there in the ion of the hypothetical element 10Az+?…

A: We have to predict the number of electrons, protons and neutrons.

Q: Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of…

A: Given : There are 2 naturally occurring isotopes of Bromine. Mass of Isotope 79Br = 78.9 amu…

Q: A) Period 3 alkaline earth metal: B) Period 5 noble gas: C) Period 3 element with 4 valence…

A: Answer a, b & c ) :  A) Period 3 alkaline earth metal = ?  B) Period 5 Noble gas = ?  C) Period…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.