integrated physics and chemistry

If an unknown element displays many extremely strong metallic properties, where is it most likely to be located on the periodic table? far right along the "stair step" middle far left

far left ⬅

There are three known forms of hydrogen. These forms are called_______of each other. Each of these forms will have the same number of_______but different numbers of _______in their nuclei.

isotopes protons neutrons

Use the periodic table entry below to answer the following question. How many protons does the element cobalt (Co) have? 27 32 58.93 59

27

The first person to develop the periodic table was _____. Mendeleev Dalton Bohr Rutherford

Mendeleev 🐱‍👓

Using the periodic table entry of iron below, match the numbers with what they represent. __________________ 26 2 | 8 | Fe 14 | 2 | Iron | 55.845 | ___________________

Name......... Iron Symbol...... Fe Atomic Number........ 26 Atomic Mass... 55.845 atomic mass units Number of Protons.... 26 Number of Neutrons.... 30 Number of Electrons..... 26 Melting Point.... 1535.0° C Boiling Point..... 2750.0° C Density...... 7.86 grams per cubic centimeter Normal Phase... Solid Family..... Transition Metal Period..... 4 Cost...... Unknown number of orbits .... The number 4 number of electrons in n = 3.... The number 14

2. A substance is tested and is found to have the following physical properties: high electrical conductivity malleability high luster The substance is most likely a _____. metal metalloid nonmetal cannot be determined without more data

metal

4. Which of the following would be classified as a metalloid? aluminum, copper, tin, silicon,

silicon

A period is a horizontal row on the periodic table. true or false

true

Use the periodic table entry below to answer the following question. Is the atomic weight of hydrogen is 1.00794? true or false

true 🐱‍🐉

Match the element properties with their descriptions 1. ability to be pounded into shapes 2. how well a substance flows at a given temperature 3. the ability to dissolve in another substance 4. degree of surface smoothness 5. the mass of a sample divided by its volume 6. how "shiny" a material is 7. ability to be pulled into a wire,

1.malleability 2.viscosity 3.density 4.texture 5.solubility 6.luster 7.ductility

Use the periodic table entry below to answer the following question. What is the atomic mass of the element cobalt (Co)? 27 31 59 31.71

27

Which of the following families contains elements that will not form compounds? 1. metalloids 2. halogens 3. noble gases 4. strong metals

3. noble gases

Which of the following elements is not in the same family on the periodic table? 1. N 2. O 3. P 4. Sb

4. sb