CD4060 with external clock pulse

Question

I am trying to make realtime, low power 1hr audio indicator using binary counters. I don't need display so not using decade counters or 7 segment display ICs. So I bought bunch of CD4060 binary counters, because they have inbuilt oscillator.
Later I figured out I can get reliable & accurate 1Hz/1second pulse from external, crystal based, source.
My question is how can I configure CD4060 to use external clock instead of using timing capacitor and resistors?
Following is the functional diagram of the IC.

1. Can I give external clock directly to pin 11(RS) and leave pin 10(time resistor) and 9(time capacitor) hanging without connection?
2. Or can I give external pulse directly to pin 9 and leave pin 10 and 11 hanging?
3. will leaving other pins(11/10/9) hanging introduce errors due to external noise as it is CMOS IC? I can't ground them though.

I know, I can use CD4020 here, but I've already bought CD4060 and don't want to waste them.
I know, real time clock ICs, Arduino and like solutions can be used. I don't have microcontroller programming equipments.

Answer 1

Can I give external clock directly to pin 11(RS) and leave pin 10(time resistor) and 9(time capacitor) hanging without connection?

Yes you can but don't forget to connect MR (pin 12) to 0 volts.

Or can I give external pulse directly to pin 9 and leave pin 10 and 11 hanging?

Probably not.

will leaving other pins(11/10/9) hanging introduce errors due to external noise as it is CMOS IC? I can't ground them though.

You should not leave pin 11 hanging. Pins 9 and 10 are outputs that happen to also connect to internal inputs.

I don't know what data sheet you used but this one says this: -