Question

Need help ASAP 53 points!!!!

1. In your own words, explain the periodic law.

2. Why did Mendeleev leave gaps in his early periodic table, and what was the ultimate importance of the gaps?

3. What properties do metalloids display, and where are metalloids found on the periodic table?

Answer 1

1. According to the periodic law, both chemical and physical elements and their properties are periodic functions of their atomic numbers, thus recurring in a predictable periodical pattern

2. Mendeleev knew that some certain elements existed, he expected that in the future, the gaps would be filled because at the time, they had not been discovered yet.

3. The properties of metalloids are boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At). They are found between metals and non-metals on the periodic table. They appear in a stairstep-like pattern.

Answer 2

Answer: Mix of answers below

Step-by-step explanation:

1. The Periodic law is a physics law that determines on how many groups will the elements be split into, taking into acount their atomic numbers. According to them, an order will be listed. We'll be able to find regular intervals for a determined number of elements that a share a similarity on its properties.
2. Mendeleev left gaps in his early periodic table because even though he was sure there was more elements to exist, those hadn't been officially discovered yet.
3. Metalloids main properties are:

• Density: this is a concepts used to describe the relationship between mass and volume.
• Electric conductivity: metalloids are fairly good electricity conductors. However, since we have a distintion between metalloids and actual metals, these last ones are far more better at this task.