mass number minus atomic number. The isotopes are similar because they have the same number of electrons which determines the properties of an element. They are different because they have a different number of neutrons. 7. Explain how two isotopes of an element are similar. Explain how they are different. * Two atoms of the same element that differ in the number of neutrons are isotopes. Neutrons are the neutral particles found in atoms. The isotopes have the same number of electrons which
Premium Biology Life Organism
The six stable isotopes of selenium are 74Se‚ 76Se‚ 77Se‚ 78Se‚ 80Se‚ and 82Se (Chemical). “These isotopes occur naturally with approximate abundances of 0.87‚ 9.02‚ 7.58‚ 23.52‚ 49.82‚ and 9.19%.” (Chemical) Artificial isotopes have also been created by using the neutron activation method. Neutron activation essentially determines the concentration of an element in materials ("For Chemical Analysis”). One important isotope that has been created is the gamma-emitting
Premium Natural gas Water Oxygen
of Magnesia 22 Dinitrogen oxide Gas in whipped cream cans 23 Potassium nitrate KNO3 Saltpeter 24 Potassium permanganate KMnO4 Used in water softeners B. Follow-Up Questions: Part I 1. How are isotopes of an element different from one another? How are they the same? (10 points) The isotopes of an element have the same amount of protons‚ but a different amount of neutrons‚ so they vary in size. 2. Are mass number and
Premium Chlorine Carbon dioxide Sodium carbonate
Relative mass | Relative charge | Electron | Negligible (about 1/2000th the mass of a proton) | -1 | Proton | 1 | +1 | Neutron | 1 | 0 | Isotopes - Same element could have different atomic masses. - These atoms are isotopes‚ and this word means ’equal place’. - Occupying the same place in the Periodic Table and having the same atomic number. - Isotopes are atoms with same atomic number‚ but different mass numbers. - Atomic number (Z) = number of protons - Mass number (A) = number of protons
Premium Atom Chemistry
Lab #3 Atomic Structure & Classification of Matter Objectives Write the correct symbols or names of some elements. Describe some physical properties of the elements you observe. Categorize an element as a metal or nonmetal from its physical properties. Given the complete symbol of an atom‚ determine its mass number‚ and the number of protons‚ neutrons‚ and electrons. To identify and classify different types of matter. Background Primary substances‚ called elements‚
Free Periodic table Chemical element Atom
The total number of protons and |there are a few good animations of this. |Explain how isotopes of the same atom |IWB flipchart | | |neutrons in an atom is called the mass |Activity 1 Label diagram of an atom‚ What provides the mass of an atom? |differ.
Premium Atom Chemical element Quantum mechanics
and scroll through until you find the appropriate page] 1) Go to http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/radiation/radiocativerev1.shtml . What is an isotope? How many isotopes of hydrogen are there? An isotope is an atoms which are from the same element but have different numbers of neutrons. Hydrogen has three isotopes. 2) Use the Bitesize pages and the ‘Y10 radioactivity’ file (especially the ‘types of radiation’ animation and videos in the ‘Radiation types- range and stopping’
Premium Ionizing radiation Electron Radioactive decay
New forensic laser technique for hair analysis Using a new laser technique‚ Jim Moran and his colleagues at Pacific Northwest National Laboratory‚ have devised a method of separating out the parts of hair samples that can reveal details about the recent history of the person to whom it belongs. In their paper‚ published in Rapid Communications in Mass Spectrometry‚ they describe a process they’ve devised whereby hair samples are pulled apart‚ rather than burned as a whole before being measured
Premium Infrared Spectroscopy Laser
1 1 The nucleus of one of the isotopes of nickel is represented by 60 Ni. 28 Which line in the table correctly describes a neutral atom of this isotope? number of protons A B C D 28 28 60 60 number of neutrons 32 60 28 32 number of orbital electrons 28 28 28 32 2 A nucleus of bohrium x Bh decays to mendelevium y emissions. bohrium x Bh → dubnium + α y → lawrencium + α 255 Md 101 by a sequence of three α-particle → mendelevium 255 Md + α 101 How many neutrons are there in a
Premium Atom Chemical element Neutron
Running head: QUANTITATIVE RESEARCH CRITIQUE 1 Quantitative Research Critique By Elisabeth Bryant A Paper Submitted in partial fulfillment of the requirements for NU 533 Advanced Nursing Research University of South Alabama College of Nursing Spring 2011 QUANTITATIVE CRITIQUE 2 Quantitative Research Critique This is a critique of the quantitative research article titled Influence of Obesity and Type 2 Diabetes on Gluconeogenesis and Glucose Output in Humans studied by Amelia Gastaldelli
Premium Diabetes mellitus Insulin Diabetes mellitus type 2