- 13N, 14N and 15N They all have
- isotopes, 7 protons, 7 electron and same atomic number.
- A 50.0 Ml urine sample has a mass of 50.7 g. The specific gravity of the urine is
- 1.01
- A group of covalently bonded atoms that has an overall electrical charge is called
- Polyatomic ion.
- A proton has a positive charge and a mass of approximately 1 amu are descriptions of
- a subatomic particle
- An anion always
- Has negative charge
- CaO contains an
- ionic bond.
- Carbon Tetrachlorid -Idetify as covalent or ionic
- Covalent
- Consider a neutral atome wiht 30 protons and 34 neutrons. The number of electrons in this atom is
- 30
- Consider an isotope of sodium with a mass number of 25. The number of neutrons in this isotope of sodium is
- 14
- Density
- is often used to determine an individuals percentage of body fat
- Elements in group 2 of the periodic table form ions with a charge of
- 2+
- H2O is a
- polar covalent bond
- How many electrons will aluminium gain or lose when it forms an ion?
- lose 3
- How many electrons will chlorine gain or lose when it forms an ion?
- gain 1
- Hydrogen sulfide - Idetify as covalent or ionic
- Covalent
- In a covalent bonded molecule, the number of electrons that an atom shares with others is usually equal to the number of electrons
- needed to give it a noble gas arrangement.
- In a molecule with covalent bonding,
- atoms are held together by sharing electrons.
- In an atome, the nucleus contains
- All the protons and neutrons.
- In an electron dot structrure of an element, the dots are used to represent
- The valence electrons.
- In ionic compounds,_________lose their valence electrons to form pos. charged______________
- Metals,cations
- Isotopes are atoms of the same element that have
- the same atomic number but different numbers of neutrons.
- Low melting pooits are characteristic of
- non metal
- Mg(HSO3)2
- Magnesium hydrogen sulfite
- N and F are
- polar covalent
- N2 contains a
- Nonpolar covalent bond.
- Phosphate has how many ionic charge?
- 3-ionic charge
- Potassium oxide - Idetify as covalent or ionic
- Ionic
- Semiconductors are located in the periodic table on the
- line dividing metals from nonmetasl in the table.
- Sodium fluoride - Idetify as covalent or ionic
- Ionic
- The atomic mass of an element is equal to
- the mass of an average atom.
- The atomic number of an atom is equal to the number of
- protons
- The compound MgCl2 is named
- Magnesium chloride
- The correct formula for a compound formed from the elements Al and O is
- Al2O3
- The correct name for the compound N2O3 is
- Dinitrogen trioxide.
- The electron arrangemet of any particular atom shows
- The number of electrons in each shell.
- The elements in each group have similar chemical properties is characteristic of:
- Periodic table
- The elements lithium, sodium, and potassium
- are in the same group
- the formula for a molecule formed from N and Cl would be
- NCl3
- The group 8A elements
- Are unreactive and are rarely found in combination with other elements.
- The mass number of an atom can be calculated form
- the number of protons plus neutrons
- The name of Al2(SO4)3 is
- Aluminum sulfate
- The number of dots in the electron dot structure of carbon is
- four
- The number of dots in the electron dot structure of nitroge is
- five
- The number of valence electrons found in an atom of a group a elemnet is equal to
- its group number.
- The number of valence electrons found in an atome of group A element is equal to
- its group number.
- The octet rule indicates that
- atoms lose, gain, or share valence electrons to have 8 valence electrons
- The primary substances of which all other things are composed are
- Elements
- The ration of the mass of a substance to its volume is its?
- Density
- The shape of the ammonia molecule (NH3) is
- Pyramidal
- The smallest partical of an element that retains the characteristics of the element is an
- atom
- To form an ion, a sodium atom
- loses one electron.
- Whas is chromuim metal or non metal?
- metal
- What is sulfur a metal or non metal?
- Non metal
- What is the correct formula for iron (III) sulfide?
- Fe2S3
- What is the correct formula for the iron (II) ion?
- Fe2+
- What is the formula for aluminium nitrate?
- Al(NO3)3
- What is the formula of Na+ and PO3-/4 ions?
- Na3PO4
- What is the ionic charge of an ion with 18 protons and 15 electrons?
- 3+
- What is the mass of 2.00 L of an intravenous glucose solution with a density of 1.15 g/ml?
- 2.30 Kg
- Which one of the following compounds contains an ion with a 3+ charge?
- FeCl3
